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Gound State Properties of Nuclei in 295118 α-Decay Chain

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文摘 The properties of nuclei belonging to the a-decay chain of superheavy element 29S118 have been studied in the framework of axially deformed relativistic mean field (RMF) theory with the parameter set of NL-Z2 in the blocked BCS approximation.Some ground state properties such as binding energies,deformations,and a-decay energies Qα have been obtained and agree well with those from finite-range droplet model (FRDM).The single-particle spectra of nuclei in 295118 a-decay chain show that the shell gaps present obviously nucleon number dependence.The root-mean-square (rms) radii of proton,neutron and matter distributions change slowly from 283112 to295118 but dramatically from 279110 to 283112,which may be due to the subshell closure at Z = 110 in 279110.The a-decay half-lives in 29S118 decay chain are evaluated by employing the cluster model and the generalized liquid drop model (GLDM),and the overall agreement is found when they are compared with the known experimental data.The a-decay lifetimes obtained from the cluster model are slightly larger than those of GLDM ones.Finally,we predict the a-decay half-lives of Z = 118,116,114,112 isotopes using the cluster model and GLDM,which also indicate these two models can corroborate each other in studies on superheavy nuclei.The results from GLDM are always lower than those obtained from the cluster model.
来源 Communications in Theoretical Physics ,2009,52(6):1055-1061 【核心库】
DOI 10.1088/0253-6102/52/6/15
关键词 superheavy nuclei ; relativistic mean field ; half-lives ; cluster model ; generalized liquid drop model
地址

School of Nuclear Science and Technology,Lanzhou University, Lanzhou, 730000

语种 英文
文献类型 研究性论文
ISSN 0253-6102
学科 物理学
基金 国家自然科学基金 ;  中国科学院知识创新工程项目 ;  国家973计划
文献收藏号 CSCD:3886587

参考文献 共 49 共3页

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