Speaker
Dr
Somsundar Mukhopadhyay
(Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.)
Description
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 levels, that results when nucleons in the high-j and low-j orbitals are aligned with the rotational and primary deformation axes of the nucleus, respectively, has now been realized in a nucleus where shape-phase transition and high-K band structure are also evident. The 188Pt nucleus boasts of the unusual coexistence of high-K and shape isomers, which are two different types of energy traps in a single nucleus. The gamma-vibration like structure and the origin of one newly observed high-spin band structure in this nucleus have revealed interesting physics. All these findings have been reported in detail in two recent publications [1,2]. The 188Pt nucleus has been found to be very special, indeed, in the study of medium- and high-spin nuclear structure physics, and it presents a rare opportunity in terms of studying the interplay between nuclear axiality and triaxiality.
References:
[1] S. Mukhopadhyay et al., Phys. Lett. B 739, 462 (2014).
[2] S. Mukhopadhyay et al., Phys. Rev. C 96, 014315 (2017).
Primary author
Dr
Somsundar Mukhopadhyay
(Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.)
Co-authors
Dr
B. N. Joshi
(Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.)
Dr
B. V. John
(Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.)
Dr
D. C. Biswas
(Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.)
Mr
G. K. Prajapati
(Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.)
Dr
J. Sethi
(sudiptajit@gmail.com)
Mr
L. S. Danu
(Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.)
Dr
P. K. Joshi
(Homi Bhabha Centre for Science Education, TIFR, Mumbai 400088, India.)
Mr
P. N. Prashanth
(Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.)
Dr
R. Palit
(Department of Nuclear and Atomic Physics, TIFR, Mumbai 400005, India.)
Prof.
S. Frauendorf
(Physics Department, University of Notre Dame, Notre Dame, Indiana 46556, USA.)
Dr
S. K. Tandel
(UM-DAE Centre for Excellence in Basic Sciences, Mumbai 400098, India.)
Dr
S. Saha
(Department of Nuclear and Atomic Physics, TIFR, Mumbai 400005, India.)
Dr
Somnath Nag
(Department of Physics, National Institute of Technology, Raipur 492010, India.)
Dr
T. Trivedi
(Department of Nuclear and Atomic Physics, TIFR, Mumbai 400005, India.)
