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

Daniel T.; Kisyov S.; Regan P. H.; Marginean N.; Podolyak Zs.; Marginean R.; Nomura K.; Rudigier M.; Mihai R.; Werner V.; Carroll R. J.; Gurgi L. A.; Oprea A.; Berry T.; Serban A.; Nita C. R.; Sotty C.; Suvaila R.; Turturica A.; Costache C.; Stan L.; Olacel A.; Boromiza M.; Toma S.

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

机译：低洼兴奋状态的伽马射线光谱和OS-194的塑造竞争

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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.

机译：利用布加勒斯特IFIN-HH实验室提供的80 MeV束流与Os-192（O-18，O-16）Os-194反应，研究了富中子核Os-194中激发态的性质。利用HPGe-LaBr3（Ce）混合阵列RoSPHERE测量了激发态的离散伽马射线衰变。目前的工作确定了Os-194中许多以前未报告的低洼非yrast状态，以及302（50）ps的yrast 2（+）状态半衰期的首次测量。这相当于B（E2:2（+）->0（+））=45（16）W.u.和β（eff）=0.14（1）的固有四极形变。实验结果与Hartree-Fock-Bogoliubov相互作用玻色子模型计算结果进行了比较，并与随着中子数的增加，Os同位素四极集体的减少相一致。

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《Physical review, C》 |2017年第2期|共9页
作者
Daniel T.; Kisyov S.; Regan P. H.; Marginean N.; Podolyak Zs.; Marginean R.; Nomura K.; Rudigier M.; Mihai R.; Werner V.; Carroll R. J.; Gurgi L. A.; Oprea A.; Berry T.; Serban A.; Nita C. R.; Sotty C.; Suvaila R.; Turturica A.; Costache C.; Stan L.; Olacel A.; Boromiza M.; Toma S.;
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作者单位

Univ Surrey Dept Phys Guildford GU2 7XH Surrey England;

Horia Hulubei Natl Inst Phys &

Nucl Engn IFIN HH RO-077125 Bucharest Romania;

Univ Surrey Dept Phys Guildford GU2 7XH Surrey England;

Horia Hulubei Natl Inst Phys &

Nucl Engn IFIN HH RO-077125 Bucharest Romania;

Univ Surrey Dept Phys Guildford GU2 7XH Surrey England;

Horia Hulubei Natl Inst Phys &

Nucl Engn IFIN HH RO-077125 Bucharest Romania;

Univ Zagreb Fac Sci Dept Phys Bijenicka Cesta 32 HR-10000 Zagreb Croatia;

Univ Surrey Dept Phys Guildford GU2 7XH Surrey England;

Horia Hulubei Natl Inst Phys &

Nucl Engn IFIN HH RO-077125 Bucharest Romania;

Tech Univ Darmstadt Inst Kernphys D-64289 Darmstadt Germany;

Univ Surrey Dept Phys Guildford GU2 7XH Surrey England;

Univ Surrey Dept Phys Guildford GU2 7XH Surrey England;

Horia Hulubei Natl Inst Phys &

Nucl Engn IFIN HH RO-077125 Bucharest Romania;

Univ Surrey Dept Phys Guildford GU2 7XH Surrey England;

Horia Hulubei Natl Inst Phys &

Nucl Engn IFIN HH RO-077125 Bucharest Romania;

Horia Hulubei Natl Inst Phys &

Nucl Engn IFIN HH RO-077125 Bucharest Romania;

Horia Hulubei Natl Inst Phys &

Nucl Engn IFIN HH RO-077125 Bucharest Romania;

Horia Hulubei Natl Inst Phys &

Nucl Engn IFIN HH RO-077125 Bucharest Romania;

Horia Hulubei Natl Inst Phys &

Nucl Engn IFIN HH RO-077125 Bucharest Romania;

Horia Hulubei Natl Inst Phys &

Nucl Engn IFIN HH RO-077125 Bucharest Romania;

Horia Hulubei Natl Inst Phys &

Nucl Engn IFIN HH RO-077125 Bucharest Romania;

Horia Hulubei Natl Inst Phys &

Nucl Engn IFIN HH RO-077125 Bucharest Romania;

Horia Hulubei Natl Inst Phys &

Nucl Engn IFIN HH RO-077125 Bucharest Romania;

Horia Hulubei Natl Inst Phys &

Nucl Engn IFIN HH RO-077125 Bucharest Romania;

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中图分类原子核物理学、高能物理学;
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gamma-ray spectroscopy of low-lying excited states and shape competition in Os-194

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