Medium-spin states in 135Cs
Medium-spin states in 135Cs
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135Cs 中的中自旋态
DOI：
10.1103/physrevc.88.064315
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发表时间：
2013
影响因子：
3.1
通讯作者：
N. Fotiades
中科院分区：
文献类型：
--
作者：
Doi A.;Murata Y.;Mochizuki N.;Takeuchi H.;Asada K.;Hayashi TJ.;Nagai H.;Shibata KM.;Oyama T.;Jike T.;et al.;Akihiro Shibata;N. Fotiades
目前已知的关于中高自旋态的信息有限，因为Cs是一种富含中子的原子核，由于它接近壳层闭合，所以可以进行壳层模型计算。为了将Cs的能级结构扩展到更高的激发态，用瞬发射线能谱研究了在Theo(91 MeV)Pb聚变-裂变反应中形成的复合核Th裂变后的碎片。建立了自旋(23/2)以下的中等自旋态和3.3 MeV的激发能。观察到的态与邻近Cs核中的态以及邻近同位素中的态进行了比较。占据轨道的奇质子与六核和钡核中的Yrast态的耦合可以解释较低的激发态。实验结果与壳模型计算结果进行了比较。
Limited information is currently known on medium- and higher-spin states forCs, a neutron-rich nucleus amenable to shell-model calculations due to its proximity to the shell closures inSn. In order to extend the level structure ofCs to higher excitations, this nucleus was studied via prompt-ray spectroscopy of fragments following the fission of the compound nucleusTh formed in theO (91 MeV)Pb fusion-fission reaction. Medium-spin states up to spin (23/2) and3.3 MeV excitation energy have been established. The observed states were compared with those in the neighboringCs nucleus, as well as with states in the neighboringisotones. The coupling of the odd proton occupying theorbital to the yrast states in theXe andBa cores could account for the lower excited states ofCs. The experimental results are compared with predictions from shell-model calculations.