γ-ray spectroscopy of low-lying excited states and shape competition in 194Os

被引：11

作者：

Daniel, T. ^{[1
,2
]}

Kisyov, S. ^{[3
]}

Regan, P. H. ^{[1
,4
]}

Marginean, N. ^{[3
]}

Podolyak, Zs. ^{[1
]}

Marginean, R. ^{[3
]}

Nomura, K. ^{[5
,6
]}

Rudigier, M. ^{[1
]}

Mihai, R. ^{[3
]}

Werner, V. ^{[7
]}

Carroll, R. J. ^{[1
]}

Gurgi, L. A. ^{[1
]}

Oprea, A. ^{[3
]}

Berry, T. ^{[1
]}

Serban, A. ^{[3
,8
]}

Nita, C. R. ^{[3
]}

Sotty, C. ^{[3
]}

Suvaila, R. ^{[3
]}

Turturica, A. ^{[3
]}

Costache, C. ^{[3
]}

Stan, L. ^{[3
]}

Olacel, A. ^{[3
]}

Boromiza, M. ^{[3
,8
]}

Toma, S. ^{[3
]}

机构：

[1] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England

[2] Benue State Univ, Dept Phys, PMB 102119, Makurdi, Nigeria

[3] Horia Hulubei Natl Inst Phys & Nucl Engn IFIN HH, RO-077125 Bucharest, Romania

[4] Natl Phys Lab, AIR Div, Teddington TW11 0LW, Middx, England

[5] Univ Zagreb, Fac Sci, Dept Phys, Bijenicka Cesta 32, HR-10000 Zagreb, Croatia

[6] Univ Tsukuba, Ctr Computat Sci, Tsukuba, Ibaraki 3058577, Japan

[7] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

[8] Univ Bucharest, Fac Phys, Magurele, Romania

来源：

PHYSICAL REVIEW C | 2017年 / 95卷 / 02期

基金：

日本学术振兴会; 英国科学技术设施理事会;

关键词：

HIGH-SPIN STATES; LIFETIME MEASUREMENTS; TRANSITION; NUCLEI; ISOMER; CR-51;

D O I：

10.1103/PhysRevC.95.024328

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：

The properties of excited states in the neutron-rich nucleus Os-194 have been investigated using the Os-192(O-18, O-16)Os-194 reaction with an 80 MeV beam provided by the IFIN-HH Laboratory, Bucharest. Discrete gamma-ray decays from excited states have been measured using the hybrid HPGe-LaBr3(Ce) array RoSPHERE. The current work identifies a number of previously unreported low-lying nonyrast states in Os-194 as well as the first measurement of the half-life of the yrast 2(+) state of 302(50) ps. This is equivalent to a B(E2 : 2(+)-> 0(+)) = 45(16) W.u. and intrinsic quadrupole deformation of beta(eff) = 0.14(1). The experimental results are compared with Hartree-Fock-Bogoliubov-interacting-boson-model calculations and are consistent with a reduction in a quadrupole collectivity in Os isotopes with increasing neutron number.

引用

页数：9

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