Systematics of high-spin isomers in N = 83 isotones and a high-spin isomer beam
Systematics of high-spin isomers in N = 83 isotones and a high-spin isomer beam
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N = 83 个同位素和高自旋异构体束中高自旋异构体的系统学
DOI：
10.1140/epja1339-02
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
H. Sagawa
中科院分区：
文献类型：
--
作者：
Y. Gono;A. Odahara;T. Fukuchi;E. Ideguchi;T. Kishida;T. Kubo;H. Watanabe;S. Motomura;K. Saito;O. Kashiyama;T. Morikawa;B. Cederwall;Y. Zhang;Xiaoping Zhou;M. Ishihara;H. Sagawa
本文系统地研究了Z = 60-66的N = 83的同分异构体。奇核和奇-奇核的自旋和宇称分别为49/2+和27+。这些异构体的激发能几乎恒定，表明在变形独立粒子模型（DIPM）的框架内，随着Z从64减小到60，aZ= 64的壳层能减小。奇核和奇-奇核的组态分别为[ν（f7/2 h9/2 i13/2），π（h11/2）2]49/2+和[ν（f7/2 h9/2 i13/2），π（h11/2）2（d5/2）-1 27+。在自旋为49/2（奇数）和27（奇数-奇数）时，yrast态的形状突然从近球形变为扁球形。由于形状的变化，异构体的转变受到高度阻碍。它们可以被归类为形状异构体。还描述了利用这些高自旋异构体产生的次级束的发展。
Isomers inN= 83 isotones ofZ= 60-66, were studied systematically. Their spins and parities are 49/2+and 27+for odd and odd-odd nuclei, respectively. Nearly constant excitation energies of these isomers indicated a decrease of aZ= 64 shell gap energy asZdecreases from 64 to 60 within the framework of a deformed independent-particle model (DIPM). Their configurations are [ν(f7/2h9/2i13/2),π(h11/2)2]49/2+and [ν(f7/2h9/2i13/2),π(h11/2)2(d5/2)-1]27+for odd and odd-odd nuclei, respectively. The shape of the yrast states changes suddenly at spin 49/2(odd) and 27(odd-odd) from a near spherical to an oblate shape. Transitions from isomers are highly hindered because of the shape changes. They may be categorized to be shape isomers. The development of a secondary beam produced by using these high-spin isomers is also described.