First identification of excited states in Ba-117 using the recoil-beta-delayed proton tagging technique

Ding B.; Liu Z.; Seweryniak D.Woods P. J.Wang H. L.Yang J.Liu H. L.Davids C. N.Carpenter M. P.Davinson T.Janssens R. V. F.Page R. D.Robinson A. P.Shergur J.Sinha S.Zhu S.Tang X. D.Wang J. G.Huang T. H.Zhang W. Q.Sun M. D.Liu X. Y.Lu H. Y.

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First identification of excited states in Ba-117 using the recoil-beta-delayed proton tagging technique

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Excited states have been observed for the first time in the neutron-deficient nucleus Ba-117 using the recoil-decay tagging technique following the heavy-ion fusion-evaporation reaction Zn-64(Ni-58, 2p3n)Ba-117. Prompt. rays have been assigned to Ba-117 through correlations with beta-delayed protons following the decay of A = 117 recoils. Through the analysis of the gamma-gamma coincidence relationships, a high-spin level scheme consisting of two bands has been established in Ba-117. Based on the systematics of the level spacings in the neighboring barium isotopes, the two bands are proposed to have nu h(11/2)5325/2(-) and nu d(5/2)4135/2(+) configurations, respectively. The observed band-crossing properties are interpreted in the framework of cranked shell model.

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《Physical review, C》 |2017年第2期|共8页
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Ding B.; Liu Z.; Seweryniak D.Woods P. J.Wang H. L.Yang J.Liu H. L.Davids C. N.Carpenter M. P.Davinson T.Janssens R. V. F.Page R. D.Robinson A. P.Shergur J.Sinha S.Zhu S.Tang X. D.Wang J. G.Huang T. H.Zhang W. Q.Sun M. D.Liu X. Y.Lu H. Y.;
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Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China;

Argonne Natl Lab, Argonne, IL 60439 USA;

Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, ScotlandZhengzhou Univ, Zhengzhou 450001, Peoples R ChinaXi An Jiao Tong Univ, Xian 710049, Peoples R ChinaUniv Liverpool, Liverpool L69 7ZE, Merseyside, EnglandUniv Maryland, College Pk, MD 20742 USA;

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中图分类原子核物理学、高能物理学;
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First identification of excited states in Ba-117 using the recoil-beta-delayed proton tagging technique

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