Speakers
Mr
Sutanu Bhattacharya
(Guru Ghasidas Vishwavidyalay, Bilaspur)Dr
Tarkeshwar Trivedi
(Guru Ghasidas Vishwavidyalaya, Bilaspur)
Description
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 aligned at similar rotational frequencies resulting into back-bending and band-crossing for positive and negative parity bands [3]. In the present work, high-spin states were populated using 58Ni(16O, 4p) 70Ge fusion evaporation reaction at a beam energy of 85 MeV. The experiment was performed at Tata Institute of Fundamental Research (TIFR), Mumbai and emitted gamma rays were detected by Indian National Gamma detector Array (INGA). The level structure of 70Ge has been extensively studied by matrix and cube. The yrast positive parity 0+ band has been extended up-to 16+ state which shows the neutron alignment in ν(g9/2) orbitals at 10+ state. However, the second 0+ band has been extended up-to 12+ state with the addition of new ΔI=2 transition along with ΔI=0 interconnecting transitions. The negative parity bands have been extended upto 21- state by addition of four new gamma transitions. We have also observed a new negative-parity decoupled band and a possible gamma vibrational band. In order to confirm the nature of transitions, we have performed the direction correlation of the orientated (DCO) measurements.
[1] R. Palit et al., Phys. Rev. C. 63, 024313 (2001)
[2] T. Trivedi et al., Phys. Rev. C. 80, 047302(2009)
[3] M. Sugawara et al., Phys. Rev. C. 81, 024309(2010)
Primary author
Mr
Sutanu Bhattacharya
(Guru Ghasidas Vishwavidyalay, Bilaspur)
Co-authors
Mr
B.S Naidu
(Tata Institute of Fundamental Research, Mumbai)
Dr
D. Negi
(UM-DAE Centre for Excellence in Basic Sciences, Mumbai)
Dr
J Sethi
(Tata Institute of Fundamental Research, Mumbai)
Dr
M.K Raju
(Research Center for Nuclear Physics (RCNP) , Osaka)
Mr
R Dhonti
(Tata Institute of Fundamental Research, Mumbai)
Dr
R Palit
(Tata Institute of Fundamental Research)
Mr
S Jadhav
(Tata Institute of Fundamental Research, Mumbai)
Dr
S Nag
(National Institute of Technology, Raipur)
Dr
S Saha
(Tata Institute of Fundamental Research, Mumbai)
Dr
Tarkeshwar Trivedi
(Guru Ghasidas Vishwavidyalaya, Bilaspur)
