Simultaneous investigation of the T=1(Jπ=0+) and T=0(Jπ=9+) β decays in Br70
Simultaneous investigation of the T=1(Jπ=0+) and T=0(Jπ=9+) β decays in Br70
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同时研究Br70中T=1(Jπ=0+)和T=0(Jπ=9+)β衰变
DOI：
10.1103/physrevc.95.064327
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发表时间：
2017
影响因子：
3.1
通讯作者：
Gel
中科院分区：
文献类型：
--
作者：
Morales A. I.;Algora A.;Rubio B.;Kaneko K.;Nishimura S.;Aguilera P.;Molina F.;de Angelis G.;Kiss G.;Nishimura D.;Oikawa H.;Goigoux T.;Giovinazzo J.;Ascher P.;Agramunt J.;Ahn D. S.;Baba H.;Blank B.;Davies P.;de France G.;Fujita Y.;Fukuda N.;Ganioglu E.;Gel
用BigRIPS和EURICA装置在日本理研西田中心的放射性离子束工厂(RIBF)研究了奇奇核的衰变。这两种异构体都是在飞行过程中产生的，其比例分别为41.6(8)%和58.4(8)%。测量了它们的半衰期，用于射线时间衰变分析。根据这一结果，我们给出了一个新的MS基态半衰期的值，它比文献中报道的最好的测量结果更精确，并且与文献中报道的最好的测量值非常一致。对于这种衰变，我们提供了子核中通过态衰变的总分枝比例的第一个估计。我们还报道了在661、1103、1561和1749keV处的四个新的低强度射线跃迁，这些跃迁发生在它们的异构体衰变之后。根据它们的符合关系，我们试探性地提出了3945和4752keV两个新的激发态，它们分别具有最可能的自旋和偶数。用壳层模型计算解释了观察到的结构，该模型预测了在低激发能下扁平和长形构型之间复杂的相互作用。
Thedecay of the odd-odd nucleushas been investigated with the BigRIPS and EURICA setups at the Radioactive Ion Beam Factory (RIBF) of the RIKEN Nishina Center. Theandisomers have both been produced in in-flight fragmentation ofwith ratios of 41.6(8)% and 58.4(8)%, respectively. A half-life ofms has been measured for theisomer from-ray time decay analysis. Based on this result, we provide a new value of the half-life for theground state ofms, which is slightly more precise, and in excellent agreement, with the best measurement reported hitherto in the literature. For this decay, we provide the first estimate of the total branching fraction decaying through thestate in the daughter nucleus. We also report four new low-intensity-ray transitions at 661, 1103, 1561, and 1749 keV following thedecay of theisomer. Based on their coincidence relationships, we tentatively propose two new excited states at 3945 and 4752 keV inwith most probable spins and parities ofand, respectively. The observed structure is interpreted with the help of shell-model calculations, which predict a complex interplay between oblate and prolate configurations at low excitation energies.