Physics Letters B (Jul 2018)
Observation of multiple doubly degenerate bands in 195Tl
- T. Roy,
- G. Mukherjee,
- Md.A. Asgar,
- S. Bhattacharyya,
- Soumik Bhattacharya,
- C. Bhattacharya,
- S. Bhattacharya,
- T.K. Ghosh,
- K. Banerjee,
- Samir Kundu,
- T.K. Rana,
- P. Roy,
- R. Pandey,
- J. Meena,
- A. Dhal,
- R. Palit,
- S. Saha,
- J. Sethi,
- Shital Thakur,
- B.S. Naidu,
- S.V. Jadav,
- R. Dhonti,
- H. Pai,
- A. Goswami
Affiliations
- T. Roy
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata - 700064, India; Homi Bhaba National Institute, Training School Complex, Anushakti Nagar, Mumnai - 400094, India
- G. Mukherjee
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata - 700064, India; Homi Bhaba National Institute, Training School Complex, Anushakti Nagar, Mumnai - 400094, India; Corresponding author at: Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata - 700064, India.
- Md.A. Asgar
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata - 700064, India; Homi Bhaba National Institute, Training School Complex, Anushakti Nagar, Mumnai - 400094, India
- S. Bhattacharyya
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata - 700064, India; Homi Bhaba National Institute, Training School Complex, Anushakti Nagar, Mumnai - 400094, India
- Soumik Bhattacharya
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata - 700064, India; Homi Bhaba National Institute, Training School Complex, Anushakti Nagar, Mumnai - 400094, India
- C. Bhattacharya
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata - 700064, India; Homi Bhaba National Institute, Training School Complex, Anushakti Nagar, Mumnai - 400094, India
- S. Bhattacharya
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata - 700064, India
- T.K. Ghosh
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata - 700064, India; Homi Bhaba National Institute, Training School Complex, Anushakti Nagar, Mumnai - 400094, India
- K. Banerjee
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata - 700064, India; Homi Bhaba National Institute, Training School Complex, Anushakti Nagar, Mumnai - 400094, India; Department of Nuclear Physics, Research School of Physics and Engineering, Australian National University, Canberra, ACT 2601, Australia
- Samir Kundu
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata - 700064, India; Homi Bhaba National Institute, Training School Complex, Anushakti Nagar, Mumnai - 400094, India
- T.K. Rana
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata - 700064, India
- P. Roy
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata - 700064, India; Homi Bhaba National Institute, Training School Complex, Anushakti Nagar, Mumnai - 400094, India
- R. Pandey
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata - 700064, India; Homi Bhaba National Institute, Training School Complex, Anushakti Nagar, Mumnai - 400094, India
- J. Meena
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata - 700064, India
- A. Dhal
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata - 700064, India
- R. Palit
- Tata Institute of Fundamental Research Centre, Colaba, Mumbai - 400005, India
- S. Saha
- Tata Institute of Fundamental Research Centre, Colaba, Mumbai - 400005, India
- J. Sethi
- Tata Institute of Fundamental Research Centre, Colaba, Mumbai - 400005, India
- Shital Thakur
- Tata Institute of Fundamental Research Centre, Colaba, Mumbai - 400005, India
- B.S. Naidu
- Tata Institute of Fundamental Research Centre, Colaba, Mumbai - 400005, India
- S.V. Jadav
- Tata Institute of Fundamental Research Centre, Colaba, Mumbai - 400005, India
- R. Dhonti
- Tata Institute of Fundamental Research Centre, Colaba, Mumbai - 400005, India
- H. Pai
- Saha Institute of Nuclear Physics, Kolkata 700064, India
- A. Goswami
- Saha Institute of Nuclear Physics, Kolkata 700064, India
- Journal volume & issue
-
Vol. 782
pp. 768 – 772
Abstract
The High-spin states in 195Tl, populated through the 185,187Re(13C, xn) fusion evaporation reaction at the beam energy of 75 MeV, were studied using the Indian National Gamma Array (INGA). More than 50 new γ transitions have been placed in the proposed level scheme which is extended up to the excitation energy of ≈ 5.6 MeV and spin=22.5ħ. Two pairs of degenerate bands based on two different quasi-particle configurations have been identified in this nucleus indicating the first observation of such bands in an odd-A nucleus in A∼190 region and signify the first evidence of multiple chiral bands in a nucleus in this region. The total Routhian surface calculations predict triaxial shapes for both the configurations and thereby, support the experimental observation. The importance of multiple neutron holes in the i13/2 orbital and the stability of shapes for these two configurations have been discussed. Keywords: Nuclear Structure, γ-ray spectroscopy, Doubly degenerate bands, TRS calculation
