Prof.
P. Fallon
(Lawrence Berkeley National Laboratory, Berkeley CA 94720, USA)
12/03/2018, 09:50
Invited Talk
The study of nuclei far from stability is one of the most active and challenging areas of nuclear structure physics. One of the most exotic neutron-rich nuclei currently accessible to experiment is 40Mg, which lies at the intersection of the nucleon magic number N=28 and the dripline, and is expected to have a large prolate deformation similar to that observed in neighboring isotopes 32-38Mg....
Dr
M. Riley
(1Department of Physics, Florida State University, Tallahassee, FL 32306, U.S.A.)
12/03/2018, 11:00
Invited Talk
The light rare-earth nuclei near N = 90, are textbook examples (Refs. 1-10) of the
evolution of nuclear structure with excitation energy and angular momentum. They
display a variety of different phenomena, such as, multiple backbends, dramatic prolate
to oblate shape changes associated with band termination plus a spectacular return to
collectivity extending discrete gamma-ray spectroscopy...
Dr
A. Navin
(Grand Accélérateur National d'Ions Lourds, 14000 Caen, France)
12/03/2018, 11:30
Invited Talk
The characteristic -decay of the excited states of the long chains of isotopes of fission fragments provides fingerprints of the evolution of the underlying nuclear configurations of individual and collective motion of the nucleons as a function neutron-proton asymmetry and angular momentum. The characterization of the -decay of the excited states of these nuclei, especially those far from...
Prof.
A.K. Jain
(Department of Physics, Indian Institute of Technology, Roorkee 247667)
12/03/2018, 12:00
Invited Talk
We present an overview of the seniority and generalized seniority approaches and the various experimental signatures of their validity. We also discuss how the seniority isomers arise and under what conditions. We test the validity of the seniority quantum number with increasing j and in the presence of many j-orbitals. We find that the generalized seniority quantum number retains its...
Dr
Muralithar S
(IUAC)
12/03/2018, 12:30
Invited Talk
Evolution of collectivity and symmetry in nuclei
S. Muralithar
(on behalf of INGA group at IUAC)
Inter University Accelerator Centre, New Delhi, 110067, India
Studies of extreme nuclear shapes fascinated scientists and are pursued over decades. Nuclei present
themselves with interesting shapes and structures at different spin, excitation energy and also with
number of neutrons and...
Dr
D.C. Biswas
(Bhabha Atomic Research Centre)
12/03/2018, 14:00
Invited Talk
Nuclear fission process offers an opportunity to study the interplay of the nuclear structure and dynamics in the fission process. In nuclear fission, a large number of neutron-rich nuclei are produced and the shape of the fissioning nucleus evolves in the multidimensional space of relative separation, neck opening, mass asymmetry and deformation of the fragments. In this talk the role of...
Dr
S. Bhattacharya
(Variable Energy Cyclotron Center)
12/03/2018, 14:30
Invited Talk
Nuclei near shell closures provide the opportunity to probe the various aspects of excitations of single particle orbitals and their shape driving effects. Collectivity can be induced in near spherical nuclei close to shell closure due to the high-j intruder single particle orbitals. The nuclei near Z=50, N=82 and Z=82, N=126 shell closure is difficult to access by heavy ion reactions and...
Prof.
Pragya Das
(IIT Bombay)
12/03/2018, 15:00
Invited Talk
Nuclei at high angular momentum states exhibit various symmetries. The underlying physics which describe these symmetries are often model dependent. Therefore, it is difficult to find a unique set of experimental observables. Originally, Chiral symmetry was recognized by two nearly degenerate bands. A stringent test of Chirality now is the observation of a regular pattern of reduced...
Dr
Purnima Singh
(Irfu, CEA, Universite Paris-Saclay, F-91191 Gif-sur-Yvette, France)
12/03/2018, 15:30
Invited Talk
The study of various modes of excitations and the associated evolution of nuclear shapes along spin and isospin axes in
atomic nuclei is one of the fundamental quest in nuclear physics. In this regard, the neutron rich nuclei with Z~40 and N~60
have attracted considerable attention recently. While the ground states of Sr, Zr, and Mo isotopes with N ranging from the
magic number N = 50 up to...
Prof.
C.R. Praharaj
(Institute of Physics, Bhubaneswar 751005)
12/03/2018, 16:00
We emphasise the role of interacting Neutrons and Protons in large Shell Model Spaces,
interacing by effective two-body interactions , in determining nuclear properties, deformations
and spectra.
Theoretical formalism to study the many-body interacing system will be discussed.
Deformed Hartree-Fock theory and Angular Momentum Projection (along with diagonalisation
for band mixing will be...
Prof.
S.K. Tandel
(UM-DAE Centre for Excellence in Basic Sciences, Mumbai, India)
13/03/2018, 09:00
Invited Talk
Nuclei with Z < 82 and multiple nucleons in hole states with respect to the heaviest doubly-magic nucleus 208Pb are near-spherical, and have high-j valence orbitals: neutron i13/2 and proton h11/2, present near the respective Fermi surfaces. These are suitable conditions for the realization of high-spin isomers with configurations having dominant contributions from high-j orbitals. Several...
Dr
S. Sihotra
(Department of Physics, Panjab University, Chandigarh-160014, India.)
13/03/2018, 09:30
Invited Talk
The nuclei approaching the neutron and proton major shell closure at N=Z=50 provide a unique opportunity to study interplay between the single particle and collective degree of freedom and the influence of the valence orbitals on deformation. Theoretical interpretation of band structures observed in the nuclei approaching major shell closures at N=Z=50 have revealed diversity in the...
Dr
J. Gerl
(FAIR/GSI Darmstadt Germany)
13/03/2018, 10:15
Invited Talk
The international FAIR project at GSI aims for an unprecedented facility for research with stable and radioactive ion and anti-proton beams. It will comprise of ion beam accelerators, storage rings, an anti-proton source, a fragment separator and experimental set-ups for four research pillars. These pillars are organized in large collaborations involving almost 3000 scientists: APPA for atomic...
Prof.
D.L. Balabanski
(Extreme Light Infrastructure – Nuclear Physics, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Reactorului Str. 30, 077125 Bucharest – Magurele, Romania)
13/03/2018, 10:45
Invited Talk
he emerging experimental program with brilliant gamma beams at the Extreme Light Infrastructure – Nuclear Physics facility (ELI-NP), which is under construction in Magurele, Romania will be presented with emphasis on the prepared day-one experiments. Experiments at ELI-NP will cover nuclear resonance fluorescence (NRF) measurements, studies of large-amplitude motions in nuclei, photofission...
Dr
Eiji Ideguchi
(RCNP, Osaka University)
13/03/2018, 11:15
Invited Talk
We have started a CAGRA (Clover Array Gamma-ray spectrometer at RCNP/RIBF for Advanced research) project at RCNP, Osaka Univeristy. This project constructs a Compton-suppressed Germanium clover array (CAGRA) by an international collaboration (U.S.-Japan-China-Italy, …). It consists of 16 Ge Clover detectors with BGO Compton shields. and a digital data acquisition system employing GRETINA...
Dr
Francesco Recchia
(Dipartimento di Fisica ed Astronomia "Galileo Galilei" Universita' degli Studi di Padova)
13/03/2018, 11:45
Invited Talk
The SPES Radioactive Ion Beam facility at INFN-LNL is presently in the construction phase. The facility is based on the Isol (Isotope separation on-line) method with an UCx Direct Target able to sustain a power of 10 kW. The primary proton beam is provided by a high current Cyclotron accelerator with energy of 35-70 MeV and a beam current of 0.2-0.5 mA. Neutron-rich radioactive ions are...
Prof.
P. Chowdhury
(Radiation Laboratory Pinanski 201 University of Massachusetts Lowell Lowell, MA 01854)
13/03/2018, 12:15
Invited Talk
The talk will focus on (a) high-resolution gamma-ray spectroscopic studies of beta-delayed neutron-emitters far from stability at the the Californium Rare Isotope Breeder Upgrade (CARIBU) facility at Argonne National Lab; and (b) advances in fast neutron spectroscopic techniques with CLYC scintillators at Los Alamos National Lab and at the Radiation Laboratory at UMass Lowell.
Dr
AJAY DEO
(IIT ROORKEE)
13/03/2018, 14:00
Oral
Nuclei in the region between the doubly magic 208Pb and reflection asymmetric nuclei around A ~ 220 provide an ideal platform to understand evolution of octupole collectivity. It has been established that octupole correlation suddenly emerge at N = 129, while nuclei with N < 129 show characteristic of near spherical nucleus. The octupole correlations are reflected in sequences of...
Dr
C.S. Palshetkar
(Tata Institute of Fundamental Research)
13/03/2018, 14:00
An important observation common in strip detectors is the cross-talk occurring between its different strips due to electronic coupling between them. In the present work this has been investigated for a planar HPGe strip detector, proposed to be used in the g-array for the DEcay SPECtroscopy [1] measurements at the upcoming FAIR [2] facility. The effect of cross-talk on the summed energy signal...
Dr
Akhil Jhingan
(Inter University Accelerator Centre, P. O Box 10502, Aruna Asaf Ali Marg, New Delhi – 110067)
13/03/2018, 14:15
Akhil Jhingan1*, R. Palit2, R. P. Singh1
1Inter University Accelerator Centre, P. O. Box 10502, New Delhi – 110067
2Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai 400005
* akhil@iuac.res.in, jhinganakhil@gmail.com
The development of high resolution large gamma arrays such as INGA [1,2] have provided opportunities to nuclear structure...
Dr
Somsundar Mukhopadhyay
(Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.)
13/03/2018, 14:15
A shape-transitional nucleus that sits at the limit of nuclear axiality and the onset of nuclear triaxiality has rarely revealed such a wide range of features in its excited level structure as in the case of 188Pt. The medium- and high-spin level structures in this nucleus have been thoroughly investigated using Indian National Gamma Array (INGA) at TIFR, Mumbai. One exotic sequence of energy...
Mr
Sanat Pandit
(Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai - 400085, India)
13/03/2018, 14:30
Oral
The dynamics of the reactions involving weakly bound nuclei is a topic of current interest [1-3]. The low breakup threshold of such nuclei leads to the breakup as well as fragment-capture reaction processes and consequently affect the reaction dynamics. Here, the fragment capture reaction mechanisms have been studied for 7Li + 93Nb system. Exclusive particle-γ coincidence measurements were...
Dr
Anagha Chakraborty
(Department of Physics, Visva Bharati), Mrs
Hajera Sultana
(Department of Physics, Visva Bharati), Ms
Rajashri Bhattacharjee
(UGC - DAE CSR, Kolkata 700 098)
13/03/2018, 14:30
Poster
The level structure of the odd-mass 29Al nucleus has been investigated following heavy-ion induced fusion evaporation reaction, 18O(13C, 1p1n)29Al. The accelerated beam at 30-MeV was provided by the BARC-TIFR Pelletron Linac facility at Mumbai, India. The de-exciting gamma rays were detected using INGA (Indian National Gamma Array). During the time of the experiment, the array was comprised of...
Prof.
B P Singh
(Physics Department, Aligarh Muslim University, Aligarh-202 002, India)
13/03/2018, 14:45
Oral
Recent experiments have indicated that the significant fusion incompleteness plays an important role in heavy ion induced reactions even at energies as low as ≈ 4-7 MeV/nucleon. The enhancement in the measured cross-sections of α-emitting channels as compared to that predicted by statistical models, has been attributed to the incomplete fusion (ICF) processes. Here, information about the...
Dr
Tarkeshwar Trivedi
(Department of Pure & Applied Physics, Guru Ghasidas Vishwavidyalaya, Bilaspur)
13/03/2018, 14:45
The energy on which our life depends originates in nuclear reactions at the center of the nearest star, our sun. The understanding of these processes has developed greatly by the major efforts in observations, however there are still challenging questions remain to answer. The understanding of these phenomena requires precise cross section information’s. The 3 MV particle accelerator facility...
Prof.
S.K Chamoli
(Department of Physics & Astrophysics, University of Delhi, Delhi 110007)
13/03/2018, 15:00
The Lu nuclei (A = 161 -167) present normal deformed prolate shape near ground state but assume strongly deformed triaxial shapes (TSD) [1] at I >= 25 h. The origin of large triaxiality ($\gamma$ ~ 150) giving TSD bands at high spins in Lu nuclei, though difficult to describe, is rather important in order to understand. Interestingly, beyond 167Lu [2], no other higher mass Lu nuclei has shown...
Prof.
Andreas Oberstedt
(Extreme Light Infrastructure - Nuclear Physics (ELI-NP))
13/03/2018, 15:30
Invited Talk
Nuclear fission is a complex process, which – after almost 80 years since its discovery – is still not fully understood. One field of research is for instance studies of the de-excitation process of fission fragments, which in the early stages, i.e. within a few nanoseconds after scission, takes place through the successive emission of prompt neutrons and gamma rays. For nuclear applications,...
Dr
Makoto Sakuda
(Physics Department, Okayama University, Japan)
13/03/2018, 16:00
Invited Talk
We have carried out an experiment E398 at RCNP (Osaka) to measure
gamma rays from both hadronic decay and direct electromagnetic decay of
giant resonance of 12C and 16O using 392-MeV proton beam, high-resolution
magnetic spectrometer Grand-Raiden and an array of NaI(Tl) counters.
We first confirmed the consistency of our cross section of the known levels
(12.71MeV, 15.11MeV) with the...
Prof.
V. Nanal
(Tata Institute of Fundamental Research)
13/03/2018, 16:30
Double beta decay (DBD) is a rare second-order weak nuclear transition, first suggested by Maria Goeppert-Mayer in 1935 [1]. Generally, in the case of a beta unstable parent nucleus it is extremely difficult to distinguish the rare DBD from an intensive single beta decay background. There are 35 even-even nuclides with single beta decay either energy forbidden or spin suppressed, which makes...
Dr
D. Ayangeakaa
(United States Naval Academy, Department of Physics, 572 Holloway Road, Annapolis, MD 21402 USA.)
13/03/2018, 17:00
Invited Talk
Observation of neutrinoless double-beta decay $(0\nu\beta\beta)$ would both
demonstrate the Majorana nature of the neutrino and provide experimental access to its
absolute mass scale. A great deal of experimental effort is, therefore, being dedicated to
the detection of this rare process. However, results of nuclear structure calculations of
nuclear matrix elements which mediate the decay...
Prof.
S. S. Ghugre
(UGC DAE CSR Kolkata Centre, Kolkata 700098)
14/03/2018, 09:00
Invited Talk
The Kolkata Centre of the UGC-DAE Consortium for Scientific Research has been contributing to the nuclear structure research in the ountry for around two decades starting with setting up a modest clover array at TIFR in 1999 and later working towards conception and installation of the Indian National Gamma Array (INGA). The Consortium has been one
of the key partners in the use, operation,...
Dr
Sudipta Saha
(GSI Helmholtzzentrum Für Schwerionenforschung)
14/03/2018, 09:30
Invited Talk
The HISPEC/DESPEC experiments will explore the problems related to nuclear structure, reaction and astrophysics far from the valley of stability using γ-ray spectroscopy techniques. The experiments will be carried out after successful production, separation, and selection of these exotic nuclei at Super-FRS of FAIR. Based on the physics requirement various tracking and identification detectors...
Prof.
U. Garg
(University of Notre Dame)
14/03/2018, 10:15
Invited Talk
Wobbling of triaxial even-even nuclei represents the quantized oscillations of the principal axes of an asymmetric top relative to the space-fixed angular momentum vector or, in the body fixed frame of reference, the oscillations of the angular momentum vector about the axis of the largest moment of inertia [1]. In transverse wobbling, the odd quasiproton, with predominantly particle nature,...
Dr
Yutaka Utsuno
(Japan Atomic Energy Agency, Tokai, Japan)
14/03/2018, 10:45
Invited Talk
From the early days of nuclear-structure physics, the nature of the second 0+ state in $^{16}$O has been an attracting issue. This nucleus is a typical doubly magic nucleus, and its second 0+ state is interpreted as a four-particle four-hole state. The excitation energy of this state, however, looks too low, considering the large shell shell gap that is naively estimated to be about 11 MeV. In...
Dr
Piotr Bednarczyk
(IFJ PAN, Krakow)
14/03/2018, 11:15
Invited Talk
The medium light nuclei situated in the nuclear chart between the double magic nuclei 40Ca and 58Ni exhibit many features characteristic for well deformed heavier nuclei. Although in this regions close to the stability line the ground states are predominantly spherical or oblate, at higher values of spin well developed rotational bands are present. This happens in particular when the...
Dr
Kumar Suresh
(University of Delhi)
14/03/2018, 11:45
Invited Talk
In A ~ 130 mass region, the nuclei show many interesting phenomena like shape coexistence, MR bands, chiral bands and spin isomers. They are γ-soft in the ground state with triaxial deformation. The 134Ba nucleus has already studied for low-spin states and seen to be one of the best candidate for E(5) critical point symmetry . In the previous experimental study, the 10+, 5- and 7– isomeric...
Dr
Praveen Chandra Srivastava
(Indian Institute of Technology Roorkee, Roorkee -247667, India.)
14/03/2018, 12:15
Oral
Modern ab initio approaches, like the IM-SRG, the coupled cluster theory and the self-consistent Green’s function method, have been established and provide accurate description of nuclear properties. The ab initio approaches are more fundamental, although in many cases empirical interactions still are used as benchmarks. The ab initio calculations can be used not only for spherical nuclei, but...
Prof.
Hariprakash Sharma
(BANARAS HINDU UNIVERSITY)
14/03/2018, 14:00
Invited Talk
Investigation of Te-nuclei has been subject of considerable interest because of their transitional character. Particularly, the h11/2 orbital play important role in Te nuclei, because the alignments of low-Ω h11/2 valance protons outside the core drive the nucleus towards prolate shape and the aligned high-Ω neutrons drive the nucleus towards oblate shape and induces tri-axiality. As of this,...
Prof.
A. Goswami
(Saha Institute of Nuclear Physics, HBNI, Kolkata 700064, India)
14/03/2018, 14:30
Invited Talk
Recently a number of experiments were performed at VECC-INGA array with low energy (28-40 MeV) alpha beam. The array consists of six to seven Compton suppressed Clovers and one LEPS along with digital data acquisition system. The primary physics issues addressed in the present campaign is the study of non-yrast excitation modes in nuclei across A 190, 160, 130, 110, 70, 40 mass regions....
Ms
Monica Karday
(Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, Punjab, India)
Poster
The nature of γ-bands is discussed through the variation of the energy of the lowest 2+ excitation and the energies of excited level sequence of γ-bands with respect to various parameters. The shape phase transition observed at N = 88-90 is reviewed through the γ-band. We attempted to find a correlation between the properties of ground band and the γ-band. The band head energy of γ-band is...
Mr
Md. S. R. Laskar
(TIFR), Prof.
Rudrajyoti Palit
(TIFR)
Poster
The high spin states of neutron deficient and stable isotopes remain a topic of significant interest in nuclear structure research. Heavy-ion fusion evaporation reactions are used to populate the high-spin states of these nuclei. Different exotic nuclei with quite low cross-sections can be populated in the charged particle emission channel. Large array of Compton suppressed High-Purity...
Prof.
Rabindranath Mishra
(Ravenshaw University , Cuttack)
Poster
The determination of the mass of two millisecond pulsars, PSR J0348+0432 with a mass of 2.01 ± 0.04M⊙ [1] and PSR J1614-2230 with a mass of 1.928 ± 0.017M⊙ [2] with high precision has provided a challenge to develop an equation of state (EOS) stiff enough to give such high mass. It is natural to believe that such high mass neutron stars should have high density neutron matter in its core. At...
Mr
MAHAMADUN HASAN
(ALIAH UNIVERSITY)
Poster
Study of the structure of nuclei having very small binding energy emerged has been emerging as one of the most interesting branches of physics. The exotic halo nuclei are very weakly bound, having extended low density tail and significantly large rms matter radii, are being studied extensively with the advent of RIB facilities. We apply a novel technique to study resonances in nuclei having...
Dr
Akhil Jhingan
(Inter University Accelerator Centre (IUAC))
*A. Jhingan1, B. R. Behera2, S. Mandal3, P. Sugathan1, N. Madhavan1, J. Vesic4, S. Pietri4, P. Boutachkov4, M. Gorska4, H. Schaffner4, I. Kojouharov4, J. Gerl4, H. J. Wollersheim4.
1Inter University Accelerator Centre, P. O Box 10502, New Delhi – 110067
2Department of Physics, Panjab University, Chandigarh- 160014, India
3Deptartment of Physics and Astrophysics, Delhi University, Delhi -...
Mr
Sajad Ali
(Saha Institute of Nuclear Physics, HBNI, Kolkata 700064, India)
Poster
Spectroscopic investigation of weakly deformed nuclei in mass A ∼ 140 region has generated considerable interest as they exhibit varieties of excitation mechanisms at higher excitation energy. The multi-particle configuration along with its small deformation plays an important role at higher excitation energy resulting in several novel phenomena, like shears mechanism, octupole correlation,...
Ms
Honey Sharma
(Dr. B. R. Ambedkar National Institute of Technology, Jalandhar- 144011, INDIA.)
Poster
A total of six pairs i.e. (130Ce and 134Nd, 131Ce and 133Pr, 144Gd and 148Gd, 194Hg and 198Po, 194Tl and 195Bi, 195Tl and 197Bi) of superdeformed rotational bands possessing same F0 symmetry has been investigated. The band head spin (I0) of the six pairs possessing same F0 symmetry are assigned by using the nuclear softness formula [1]. The root mean square deviation is calculated by computing...
Mr
RANABIR BANIK
(VARIABLE ENERGY CYCLOTRON CENTRE), Mr
Soumik Bhattacharya
(VARIABLE ENERGY CYCLOTRON CENTRE)
Poster
In mass 200 region, nuclei close to 208Pb show variety of band structures representing different ways of coupling of the odd valance particles with the core. The ground and first few excited states are dominated by the pure single particle orbitals near Fermi level, while the excitation of valance particles or holes to the high-j intruder orbitals play an important role in bringing high...
Dr
Ritwika Chakrabarti
(Department of Physics, K. J. Somaiya College of Science and Commerce, Mumbai)
Poster
Nuclei with Z and N between 20 and 28 are unique as the A‒40 nucleons occupying f7/2 shell outside 40Ca core are low enough to allow a full shell model description, but at the same time the numbers are large enough to develop collective behavior. The level scheme of 51Cr nucleus with four proton particles and one neutron hole is indicative of single particle nature. But a strongly deformed...
Ms
Anwesha Basu
(Indian Institute of Technology Kharagpur- 721302, India)
Poster
The nuclei in the mass region A ≃125 lie between the spherical Tin nuclei and strongly deformed Cerium nuclei; so are transitional with respect to their shapes at low and high angular momenta. The presence of an h11/2 intruder orbital, accessible to both protons and neutrons, govern the shape of the nucleus as these h11/2 nucleons have opposite deformation driving effects. Therefore, the...
Mr
Md. Sazedur Laskar
(Tata Institute of Fundamental Research)
Poster
The g-factor of an isomeric state at 2738 keV in $^{135}$La has been measured by time differential angular distribution technique. This isomer was populated in the reaction $^{11}$B($^{128}$Te,4n)$^{135}$La at beam energy of 52 MeV. The half-life of the state, 25.3(3)ns, has been remeasured. The measured value of the g-factor, -0.050(5), has been compared with the model calculations to firmly...
Dr
Bhoomika Maheshwari
(Department of Physics, Banasthali Vidyapith, Banasthali)
Poster
Our recently proposed generalized seniority scheme has been widely successful in explaining the reduced transition probabilities of high spin isomers and other excited states in semi-magic nuclei [1-5]. In the present paper, we use this formalism to obtain the g-factors of semi-magic nuclei, particularly for Sn and Pb isotopes. We find that the magnetic moment and the g-factor values do show a...
Mr
M.Kushal Kushal
(School of physics sambalpur university jyotivihar, Burla 768019 INDIA)
Poster
Studies of shell structures of neutron rich A~50 are gaining much attention from both the theoretical experimental point of view. One example of N=32 and/or 34 sub shell closer by changing the single particles orbit in this mass region [1]. A spectroscopic study of the yrast high spin state provides important information on the presence of shell gap, since large jumps in transition energies at...
Dr
Dinesh Negi
(Centre for Excellence in Basic Sciences, Mumbai, India)
Poster
Mercury isotopes in the A~190-200 region are host to a variety of particle-rotor coupling mechanisms leading to the generation of high spin states. In the present work, we report on the spectroscopic study of decoupled and semi-decoupled bands in 197Hg and 199Hg isotopes. High spin states in these nuclei were populated using multi-nucleon transfer reactions between a 1450-MeV 209Bi beam and a...
Dr
D. Singh
(Centre for Applied Physics, Central University of Jharkhand, Ranchi 835 205, INDIA)
Poster
Incomplete fusion (ICF) dynamics of heavy ion (HI) interaction with different targets has been a topic of resurgent interest at energies above the Coulomb barrier [1-2]. At these energies, the most dominant reaction modes are complete fusion (CF) and incomplete fusion (ICF) process. In complete fusion (CF) process, the projectile is completely fused with the target nucleus, forming a highly...
Mr
Amit Kumar Mondal
(Department of Physics, Visva-Bharati), Dr
Anagha Chakraborty
(Department of Physics, Visva Bharati), Mr
Kironmoy Mandal
(Department of Physics, Visva-Bharati)
Poster
The level structure of 78Se nucleus has been investigated using alpha beam from the K-130 Cyclotron at VECC, Kolkata. The excited states of the aforesaid 2n-channel residual nucleus were populated employing the 76Ge(alpha,2n) fusion evaporation reaction. The enriched 76Ge target for this measurement was prepared on mylar backing through centrifuge process. Two such targets were stacked...
Mr
Saikat Chakraborty
(Banaras Hindu University)
Poster
Nuclear meta-stable states with long half-lives are known as isomers. Systematically, rotational bands above one-quasineutron isomeric states were reported in odd-A Te-Xe-Ba isotopes around A = 130. Isomeric states with three-quasiparticle configurations are also expected in these nuclei, but reported only in 129Ba, 131,133Xe. Also, an isomeric state at 2730 keV, with T1/2 = 25 ns, was...
Ms
Poulomi Roy
(UM-DAE Centre for Excellence in Basic Sciences)
Poster
Isotopes of Tl (Z=81) near the line of stability have weakly-deformed oblate to near-spherical shapes. With increase in neutron number approaching N=126, intrinsic excitations dominate the yrast line. The nucleus 201Tl lies in this transitional region. Excited states at high spin with predominantly intrinsic configurations were studied, with a focus on isomeric levels. The data were obtained...
Mr
Umakant Lamani
(Department of Physics, Indian Institute of Technology Bombay, Powai, Mumbai - 400076, INDIA)
Poster
Doppler shift attenuation method is a modern technique to measure the nuclear lifetimes in picosecond range. However, the data analysis and results depend very sensitively on the various input parameters. The statistical quality of the data also plays an important role. Therefore, it is a challenge to obtain the accurate results. We populated the high spin states of 129Cs using heavy ion...
Prof.
B. Cederwall
(Department of Physics, KTH Royal Institute of Technology, Roslagstullsbacken 21, S-10691 Stockholm, Sweden)
Invited Talk
Recent advancements in experimental techniques now enable us to study not only excited-state energies but also electromagnetic transition strengths across long isotopic chains. In particular, the reduced electric quadrupole transition probability, B(E2), connecting the lowest-lying states directly probes the corresponding wave functions and hence provides stringent tests of theory.
The...
Dr
A. Chakraborty
(Department of Physics, Siksha Bhavana, Visva-Bharati, Santiniketan - 731 235), Mr
A.K. Mondal
(Nuclear Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai - 400 085; Department of Physics, Siksha Bhavana, Visva-Bharati, Santiniketan - 731 235), Dr
S. Mukhopadhyay
(Nuclear Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai - 400 085)
Poster
Nuclei in the vicinity of highly deformed as well as near-spherical region are expected to exhibit multi-faceted excitation modes in their level structures. 96Sr and its N=58 isotone, 98Zr, are positioned at one such interesting point in the nuclide chart. It was also predicted earlier that the 0+ states in these nuclei are associated with different types of deformations. As these...
Mr
Mandeep Singh Reen
(Okayama University)
Poster
We carried out an experiment(E398) to measure the energy and emission probabilities of gamma-rays from the giant resonances16O and 12C at Research Center for Nuclear Physics in Osaka University, using 392-MeV proton beam, high-resolution magnetic spectrometer "Grand Raiden" and an array of NaI(Tl) scintillators.
The nucleus excited to the giant resonances(GR) may decay via hadronic mode...
Mr
Takashi Sudo
(Okayama University)
Poster
Experiment(E398) was carried out at RCNP(Osaka) to measure the energy spectrum and emission probabilities of gamma-rays from giant resonances of 12C and 16O using 392-MeV proton beam, high-resolution magnetic spectrometer "Grand Raiden" and array of NaI(Tl) scintillators.
Gamma-ray emission probability from the giant resonances of 12C and 16O has been measured as a function of excitation...
Prof.
C.R. Praharaj
(Institute of Physics, Sachivalaya Marg, Bhubaneswar-751005, India)
We have studied theoretically, using deformed Hartree-Fock and angular momentum projection, the structures and spectra of excited large K configurations of multi-quasi-particle nature (upto 8 quasi-particle) for heavy Hafnium nuclei. Not much is known experimentally about such multiquasi-particle configurations and their band structures. We have theoretical results for the spectra and E2 and...
Mr
SHASHI SHEKHER TIWARY
(BANARAS HINDU UNIVERSITY)
Poster
Investigation of Te-nuclei could provide a base to study shape and phase evolution in nuclei, as it lies between spherical vibrator (Sn) and γ-soft triaxial rotor (Xe, Ba). Systematically, coexistence of collective and non-collective states has been observed in 118-122Te [1-3]. In order to extend systematic on Te-nuclei, high spin states of 124Te has been populated via 124Sn(9Be,α3n)124Te...
Dr
Swati Modi
(Department of Physics, Indian Institute of Technology, Roorkee 247667, India)
Poster
Study of proton emitters is important in nuclear physics and astrophysics both [1, 2]. The astrophysical rapid-proton capture process is inverse of the proton emission from the ground or low isomeric states. We study the structural and decay properties of triaxial proton emitting nuclei with the microscopic nonadiabatic quasiparticle approach [3]. In this approach, the rotor energies and wave...
Dr
Sukhjeet Singh
(Department of Physics, Akal University, Talwandi Sabo-151302, India)
Poster
This paper presents behavior of nuclear radius parameter (r0) of alpha-daughter nuclei with parent neutron and proton numbers. Preston’s spin–independent equations [1] of alpha-decay radioactivity were used to calculate the nuclear radius parameter (r0) of 184 even–even nuclides from up-to-date experimental alpha-decay data.
Variation of r0 parameters with parent neutron number for different...
Kawalpreet Kalra
(Amity Institute of Nuclear Science and Technology (AINST), Amity University, AUUP, Noida-201303, India)
Poster
The K = 0 bands in doubly odd nuclei [1, 2] are known to display an additional energy shift due to residual n- p interaction [3], which is known as the Newby shift [4,5]. This shift is not fully understood even now, particularly the sign of the shift. We have analyzed the updated and new experimental data of all the K= 0 bands in odd – odd nuclei [6, 7] available in the rare earth region. The...
Dr
Subhendu Rajbanshi
(Department of Physics, Dum Dum Motijheel College, Dum Dum)
Poster
Atomic nuclei possess a wide variety of shapes in both their ground and excited states. The shapes may range from spherical to deformed, from quadrupole to octupole, and even more exotic shapes, such as super-deformed and tetrahedral. For deformed nuclei, they in general
possess an axially symmetric shape. The loss of axial symmetry would lead to a triaxial shape. The wobbling motion and...
Ms
Swati Garg
(Indian Institute of Technology Roorkee)
Poster
The experimental data for the heavy mass fission fragments in thermal neutron induced fission is very scarce because of experimental limitations. Invoking the idea of isospin conservation in heavy mass neutron-rich systems [1, 2], we predict the fission fragment mass distribution for thermal neutron induced reaction 245Cm(nth, f). We have already reported similar kind of calculations for heavy...
Mrs
A Sharma
(Department of Physics, Himachal Pradesh University, Shimla 171005, India.)
Poster
The level structure of A~100 nuclei reveals intriguing phenomena even at low and moderate spin regimes such as vibrations and rotations built upon prolate deformed states [1,2,3]. The underlying configurations present a favourable condition for the possible observation of wobbling, even at low spins [4]. The aforementioned features provided the necessary impetus for us to revisit the level...
Prof.
P.K. Joshi
(HBCSE-TIFR, VN.Purav Marg, Mankhurd, Mumbai)
The most important tool in understanding the structure of nuclei is the building of their level schemes. Identification of $\gamma$ transitions and building level scheme is the first and most important step in spectroscopic studies. However, when the results are reported by researchers, due to several reasons, the energy levels, which depopulate via newly identified transitions, often get...
Dr
Mansi Saxena
(Heavy Ion Laboratory, University of Warsaw)
Poster
Numerous experimental and theoretical studies are currently focused on studying the nuclear shell structure of nuclei far from the line of stability. In particular, the evolution of nuclear properties, for example, the reduced transition probabilities across the Z = 50 isotopic chain, has been examined in detail. Radioactive ion beams yield new experimental results close to the doubly magic...
Mr
Bhushan Bhujang
(PhD student), Mr
Virendra Kumar Pasi
(IIT Bombay)
Poster
Many doubly odd nuclei in the mass region ~130 have been studied earlier for the phenomena of signature splitting, signature inversion and Chirality e. g. 126I [1], and 128I was also a good candidate. However, being close to β-stability line, it was difficult to populate 128I via compound nuclear reaction. In our preliminary investigations, we observed a good cross section ~ 80 mb [2] of...
Mr
Sutanu Bhattacharya
(Guru Ghasidas Vishwavidyalay, Bilaspur), Dr
Tarkeshwar Trivedi
(Guru Ghasidas Vishwavidyalaya, Bilaspur)
Poster
The spectroscopic study of high spin states in A =70 region have been attracted considerable interest due to occurrence of various exotic phenomena like shape co-existence, shape evolution, bandcrossing, back-bending, band termination, chirality, magnetic rotation etc.[1,2]. In even-even 70Ge nucleus, the protons and neutrons occupy the same orbitals, π(g9/2) and ν(g9/2) and hence easily...
Mr
RANABIR BANIK
(VARIABLE ENERGY CYCLOTRON CENTRE), Dr
S. Bhattacharyya
(VECC)
Poster
Nuclei around Z > 50 and N < 82 are interesting testing ground to explore the suitability and predictive powers of nuclear models at both low and high spins. Particular interest in the A ~ 130 transitional mass region is that, at low spins, the nuclei show small axial deformation whereas at higher spins, shape coexistence may occur due to the competition between the proton alignment to the...
Mr
Arunabha Saha
(Variable Energy Cyclotron Centre, Kolkata, India, PIN-700 064), Mr
S.S Alam
(Variable Energy Cyclotron Centre, Kolkata, India, PIN-700 064)
Poster
Low lying states of $^{150}$Sm have been studied through decay spectroscopy of odd-odd $^{150}$Pm, populated with $^{150}$Nd(p,n)$^{150}$Pm reaction at E$_beam$=8.0 MeV using 97% enriched $^{150}$Nd target and VENUS array of six Compton suppressed Clover HPGe detectors. Twenty new transitions are placed, five tentative $\gamma$-rays are confirmed and ten transitions are found to have altered...
Mrs
Indu Bala
(Inter University Accelerator Centre, New Delhi, India)
Poster
In the mass region A ~ 60-80, nuclei excited by heavy-ion induced nuclear reactions have revealed a variety of excitation modes, which so far cannot be explained completely in a single theoretical nuclear model. Describing the collective phenomena for the less deformed Zn isotopes with vibrational modes which for the heavier, more deformed nuclei Se and Kr converts into a rotational...
Ms
N. Behera
(School of Physics, Sambalpur University, Burla, 768 019, India)
Poster
The study of neutron-deficient Kr isotopes in the mass range A=70-80, which is in the transitional region [1], is quite interesting because these isotopes show different structures and particularly in $^{76}Kr$ shape co-existence near the ground state was observed [2, 3]. In present work, the multi-quasiparticle triaxial projected shell model (TPSM) approach [4-6] is employed to study the high...
SHAMIM HAQUE MONDAL
(ALIAH UNIVERSITY)
Poster
Global aspects of stellar object, such as the mass-radius elation, are determined by the equations of hydrostatic equilibrium,known as TOV(Tolman-Oppenheimer-Volkov) equations. A few exact solutions are known for a realistic pressure−density relation (equation of state,EOS) .These equations must be numerically solved to obtain the M−R relation. From EOS a family of different astronomical...
Dr
H Pai
(Saha Institute of Nuclear Physics, HBNI, Kolkata-700064, India), Mr
Sajad Ali
(Saha Institute of Nuclear Physics, HBNI, Kolkata 700064, India and)
Poster
Transitional nuclei in mass A~140 region are crucial laboratory to observe the interesting nuclear structure phenomena and to test variety of nuclear models. Due to the proximity of the spherical shell closures and competing shape (prolate and oblate) driving effects of the high-j (h1l/2 ) orbital near the proton and neutron Fermi levels, several novel phenomena, like shape co-existence,...
Ms
Chandrani Majumder
(Banaras Hindu University, Varanasi)
Poster
There are four proton holes and a number of neutron particles lie in the upper part of the g 9/2 proton orbital and in the middle part of the d 5/2, g 7/2 neutron orbital respectively in Pd nuclei. A number of rotational bands based on quasi neutron particles, antimagnetic rotational bands associated with proton holes and neutron particles were reported in 100,101,104Pd nucleus [1,2,3,4]. In...
Mr
Anshul Dadwal
(Dr. B.R. Ambedkar National Institute of Technology)
Poster
A systematic study of the “flat” SD bands of odd-A isotopes of Pb is done by using the two parameter exponential model with pairing attenuation. The least-squares fitting procedure is employed to extract the fitting parameters of the 9 superdeformed bands of the Pb isotopes which show almost constant variation of the dynamic moment of inertia with rotational frequency. The effective pairing...
Mr
Himanshu Kumar Singh
(Department of Physics, Indian Institute of Technology Bombay, Powai, Mumbai - 400076, INDIA)
Poster
Many nuclei near mass 130- with two nearly degenerate bands- were earlier established to have Chiral symmetry. But the electromagnetic selection rules for the inter-band and intra-band transitions provide the stringent criteria for the bands to be qualified as Chiral [1, 2]. The reduced transition probabilities, the B(E2) values follow the identical pattern for the two Chiral bands, whereas...
Mrs
Preetha P
(Research and Development Center, Bharathiar University, Coimbatore-641 046, TamilNadu)
Poster
Neutron rich Ti isotopes are particularly interesting because they exist with two proton excess near the proton magic number 20. Since the nuclei in excited state will be hot rotating due to higher agitation of nucleons (higher internal excitation), a temperature of optimum value is included in the suitable statistical model and the excited levels are calculated. The Eγ values obtained from...
Dr
Abhijit Bisoi
(Indian Institute of Engineering Science and Technology Shibpur)
Poster
Nuclei located on or close to the N = Z line have been generated a considerable interest during the last few years. This region gives us a unique opportunity to investigate the fundamental problems in nuclear physics like isospin symmetry of the nuclear interaction. The isospin T is a good quantum number under the fundamental assumptions of charge symmetry and charge independence of the strong...
