INVESTIGATING PROLATE-OBLATE SHAPE INVERSION IN Pt NUCLEI NEAR A ∼ 188

被引：4
|
作者：
Chamoli, S. K. [1 ]
Rohilla, Aman [1 ]
Gupta, C. K. [1 ]
Singh, R. P. [2 ]
Muralithar, S. [2 ]
Chakraborty, S. [3 ]
Sharma, H. P. [3 ]
Kumar, A. [4 ]
Govil, I. M. [4 ]
Biswas, D. C. [5 ]
机构：
[1] Univ Delhi, Dept Phys & Astrophys, New Delhi 110007, India
[2] Inter Univ Accelerator Ctr, Aruna Asaf Ali Marg, New Delhi 110067, India
[3] Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India
[4] Panjab Univ, Dept Phys, Chandigarh 160014, India
[5] Bhabha Atom Res Ctr, Div Nucl Phys, Bombay 400085, Maharashtra, India
来源：
ACTA PHYSICA POLONICA B | 2017年 / 48卷 / 03期
关键词：
LIFETIME MEASUREMENTS; COEXISTENCE;
D O I：
10.5506/APhysPolB.48.337
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Lifetimes have been measured of the low- and intermediate-spins states in Pt-188 nucleus using the recoil distance Doppler shift technique at IUAC, Delhi. The nuclear states of interest were populated via Yb-174 (O-18, 4n)Pt-188 reaction at a beam energy of 79 MeV provided by 15 UD Pelletron accelerator. The extracted B (E2) values show an increase up to 4(+) state and then a near constant behavior with spin along yrast band, indicating change of the nuclear shape in Pt-188 at low spins. The average absolute beta(2) = 0.20 (3) obtained from measured B (E2) values matches well the values predicted by CHFB and IBM calculations for oblate (beta(2) similar to -0.19) and prolate (beta(2) similar to 0.22) shapes.
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页码：337 / 342
页数：6
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