Various nuclear structures in 140Xe studied by β decay of ground and isomeric states in 140I
Various nuclear structures in 140Xe studied by β decay of ground and isomeric states in 140I
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通过 140I 基态和异构态的 β 衰变研究 140Xe 中的各种核结构
DOI：
10.1103/physrevc.105.044325
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发表时间：
2022
影响因子：
3.1
通讯作者：
Shimoda T. et al
中科院分区：
文献类型：
--
作者：
Yagi A.;Odahara A.;Nishibata H.;Lozeva R.;Moon C.-B.;Nishimura S.;Yoshida K.;Yoshinaga N.;Watanabe C.;Higashiyama K.;Shimoda T. et al
通过光谱学研究了位于双幻核东北部的富中子同位素的结构。在对两种不同衰变的研究中新发现了两种衰变异构体，这两种衰变是由两种反应产生的：（i）在主要目标上直接进行飞行裂变，以及（ii）在主动塞子上进行衰变。基态、低自旋异构体和高自旋异构体衰变的半衰期分别确定为0.38（2）、0.91（5）和0.47（4）s。利用射线重合关系和射线强度信息构建了高自旋异构体衰变以及基态和低自旋异构体混合衰变的衰变方案。通过将实验结果与基于大型壳模型和变形 Skyrme Hartree-Fock-Bogoliubov 加上变形准粒子随机相近似的两种理论计算进行比较，讨论了低洼态 inanda 的核结构。提出了and态和八极集体态的（准）带成员的可能候选。讨论了四极、三轴和八极集体随着中子和质子数的增加而增加。
Structure of the neutron-richisotope, located northeast of a doubly-magic nucleus, is investigated byspectroscopy. Two-decay isomers inare newly found in the study of two differentdecays ofwhich were produced by two reactions (i) direct in-flight fission at a primary target and (ii)decay ofat an active stopper. Half-lives of thedecays of the ground state, the low-spin isomer, and the high-spin isomer are determined to be 0.38(2), 0.91(5), and 0.47(4) s, respectively. Decay schemes of thedecay of the high-spin isomer and of the mixeddecays of the ground state and the low-spin isomer intoare constructed using the information on-ray coincidence relation and-ray intensity. Nuclear structures of the low-lying states inandare discussed by comparing the experimental results to two theoretical calculations based on a large-scale shell model and the deformed Skyrme Hartree-Fock-Bogoliubov plus deformed quasiparticle-random-phase approximation. Possible candidates for (quasi-)-band members ofandstates and the octupole collectivestate are proposed in. Increase of quadrupole, triaxial, and octupole collectivities is discussed with the increase of neutron and proton numbers.