过渡区核^(87)Zr的高自旋态研究  

Study of High Spin Stateal in Transitional Nucleus^(87) Zr

作　　者：赵广义[1] 李广生[1] 吴晓光[1] 刘祥安[1] 温书贤[1] 陆景斌 袁观俊[1] 杨春祥[1] 

机构地区：[1]中国原子能科学研究院,北京102413 [2]吉林大学物理系,长春130023

出　　处：《高能物理与核物理》2000年第3期213-219,共7页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金!19675056

摘　　要：通过束流能量为１１８ＭｅＶ的^(５９)Ｃｏ（^(３２)Ｓ，３ｐｎ）^(８７)Ｚｒ熔合蒸发反应，用在束ｒ谱学方法研究了~８７ Ｚｒ的高自旋态．利用 ７台反康普顿谱仪组成的探测阵列进行ｒ－ｒ符合测量，并确定部分ｒ射线的ＤＣＯ值，在此基础上建立了自旋直到（３７／２~＋）和（４３／２~－）的能级纲图．观测到了多条新的能级．与相邻的同中子异荷素的比较表明，中子对核结构性质的影响远大于质子的贡献．随着质子数的增加，第一交叉频率呈减小的趋势．High spin states in ^(87) Zr was studied through the fusion evaporation reaction ^(59)Co(^(32)S, 3pn)^(87) Zr at a beam energy of 118 MeV using in-beam r-my spectroscopic method.r-r coincidence measurement was performed by using an array consisting of seven antiCompton spectrometers, and DCO ratios of some r rays were determined. The level scheme of ~87Zr wasestablished up to spin (37/2^+ ) and (43/2^- ). Many previously unknown states have been observed. Comparison with neighboring isotones indicates that effect of neutron on nuclear structure property is predominant compared to proton, and there is a tendency of reduction in band crossing frequency with increasing proton number.

关 键 词：高自旋态 在束Γ谱学 原子核 氩87 

分 类 号：O571[理学—粒子物理与原子核物理]