新核素^(263)Hs,^(260)Bh及其α衰变链上核素的半衰期  

Half-lives of the newly synthesized nuclei in^(263)Hs and ^(260)Bhα-decay chains

作　　者：苏昕宁[1] 张鸿飞[1] 左维[1,2] 李君清[2] 

机构地区：[1]兰州大学核科学与技术学院,兰州730000 [2]中国科学院近代物理研究所,兰州730000

出　　处：《兰州大学学报（自然科学版）》2009年第5期114-118,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金项目(10775061;10505016;10575119;10175074);兰州大学理论物理与数学纯基础科学基金项目(LZULL200805);中国科学院知识创新工程重点方向项目(KJCX3-SYW-N2);科技部重大前期基础研究专项基金项目(2007CB815004)

摘　　要：运用推广的液滴模型(GLDM)并结合量子力学中的WKB方法计算了新核素^(263)Hs和^(260)Bh及其α衰变链上各核素的势垒贯穿概率,对该链上各原子核的α衰变半衰期进行了研究。计算结果表明:利用推广的液滴模型结合WKB方法计算出的α衰变半衰期可以很好地符合在超重核区的实验值,验证了推广的液滴模型在超重核区的适用性,能够很好地描述超重核的α衰变。同时,计算表明新核素^(260)Bh和^(263)Hs的合成及其半衰期的测量是可靠的。The tunneling probability of potential barrier of the newly synthesized superheavy nuclei starting from 263Hs and 260Bh was calculated with the Generalized Liquid Drop Model （GLDM） connected with WKB approximation and their half-lives studied. The calculated results that are in agreement with the experimental data show that the α-decay half-lives of superheavy nuclei with the Generalized Liquid Drop Model connecting with WKB approximation can be successfully applied in the study of superheavy nuclei and describe the α-decay of superheavy nuclei. The results also indicate that the syntheses of new nuclei 260Bh and 263Hs and the measurements of their α-decay half-lives are reliable.

关 键 词：Α衰变 超重核 推广的液滴模型 半衰期 

分 类 号：O571.21[理学—粒子物理与原子核物理]