高电荷态同质异能态的寿命(英文)  

Lifetime of Isomer in High Charge States

作　　者：吴和宇[1] 王军香[1] 靳根明[1] 

机构地区：[1]中国科学院近代物理研究所,兰州730000

出　　处：《高能物理与核物理》2003年第7期603-609,共7页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 ( 10 175 0 81,195 75 0 5 5 );国家重点基础研究发展规划项目 (G2 0 0 0 0 7740 1)资助~~

摘　　要：分析了带电原子由于缺少内转换 (同质异能态 )或电子俘获跃迁 (β衰变 )引起的核寿命的变化 .理论预言了随着电荷态的增加 ,内壳的电子在核表面的电子密度降低 ,内壳电子能级也降低 ,不稳定原子核的寿命由于前一原因而缓慢增加 ,但当内壳电子能级降到特殊能量时产生剧烈增加 .比较了由于不同的跃迁能量和跃迁类型对内转换过程的半衰期的影响 ,并将计算的理论值与一些实验测量值进行了比对 .并开发了进行这类计算的公共计算程序 .Nuclear lifetime shift of charged atom, due to lack of internal conversion (isomer) or electron capture transition (β decay), is analyzed. Theoretical predict is given, that electron density of inner shell at nuclear surface decreases and energy level also decreases with increasing of charge state, nuclear lifetime increases slightly with previous reason but increases with a jump when energy level drops to a critical value. The shifts of halflife are compared for internal conversion with different nuclear decay energy and different type of transitions. A common used computer code of this calculation created by ourselves, and the calculation results are compared with experiment one.

关 键 词：高电荷态 同质异能态 电子能级 电子密度 寿命 原子核 跃迁能量 跃迁类型 

分 类 号：O571[理学—粒子物理与原子核物理]