Experimental investigation of high-spin states in 90Zr

被引:16
|
作者
Dey, P. [1 ]
Negi, D. [1 ]
Palit, R. [1 ]
Srivastava, P. C. [2 ]
Laskar, Md S. R. [1 ]
Das, B. [1 ]
Babra, F. S. [1 ]
Bhattacharya, S. [3 ]
Das, Biswajit [1 ]
Devi, K. Rojeeta [4 ]
Gala, R. [1 ]
Garg, U. [5 ]
Ghugre, S. S. [6 ]
Ideguchi, E. [7 ]
Kumar, S. [4 ]
Kundu, A. [1 ]
Mukherjee, G. [8 ,9 ]
Muralithar, S. [10 ]
Nag, S. [11 ]
Nandi, S. [8 ,9 ]
Neelam [4 ]
Raja, M. Kumar [12 ]
Raut, R. [6 ]
Santra, R. [1 ]
Sharma, A. [13 ]
Sihotra, S. [14 ]
Singh, A. K. [15 ]
Singh, R. P. [10 ]
Trivedi, T. [3 ]
机构
[1] Tata Inst Fundamental Res, Dept Nucl & Atom Phys, Mumbai 400005, Maharashtra, India
[2] Indian Inst Technol Roorkee, Dept Phys, Roorkee 247667, Uttar Pradesh, India
[3] Guru Ghasidas Vishwavidyalaya, Dept Pure & Appl Phys, Bilaspur 495009, India
[4] Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India
[5] Univ Notre Dame, Phys Dept, Notre Dame, IN 46556 USA
[6] UGC DAE CSR Kolkata Ctr, Kolkata 700098, India
[7] Osaka Univ, Res Ctr Nucl Phys, Ibaraki, Osaka 5670047, Japan
[8] Variable Energy Cyclotron Ctr, 1-AF Bidhan Nagar, Kolkata 700064, India
[9] Homi Bhabha Natl Inst, Mumbai 400094, Maharashtra, India
[10] Inter Univ Accelerator Ctr, Aruna Asaf Ali Marg, New Delhi 110067, India
[11] Banaras Hindu Univ, Dept Phys, Indian Inst Technol, Varanasi 221005, Uttar Pradesh, India
[12] GITAM Univ, GITAM Inst Sci, Dept Phys, Visakhapatnam 530045, Andhra Pradesh, India
[13] Himachal Pradesh Univ, Dept Phys, Summer Hill, Shimla 171005, India
[14] Panjab Univ, Dept Phys, Chandigarh 160014, India
[15] Indian Inst Technol Kharagpur, Dept Phys, Kharagpur 721302, W Bengal, India
基金
美国国家科学基金会;
关键词
NEUTRON-CORE EXCITATIONS; SHELL-MODEL; EXCITED-STATES;
D O I
10.1103/PhysRevC.105.044307
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
High-spin states of Zr-90 have been investigated using the heavy-ion fusion-evaporation reaction Se-82(C-13, 5n) at a beam energy of 60 MeV. Excited levels of Zr-90 have been observed up to an excitation energy of approximate to 13 MeV and a spin of approximate to 20h with the addition of thirty-two new y-ray transitions to the proposed level scheme. Structures of both the positive- and negative-parity states up to the highest observed spin have been interpreted with shellmodel calculations using the GWBXG interaction and a Ni-68 core. Calculations suggest the role of neutron excitations across the N = 50 shell gap for states with greater than 7 MeV excitation energy. High-spin states in these bands are interpreted to be generated by the recoupling of stretched proton and neutron configurations.
引用
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页数:13
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