沿Z=0.743N+11.6质子滴线分布的稀土区新核素的合成与研究  

Synthesis and Study of New Nuclei along the Protondrip Line Z=0.743N+11.6 in Rareearth Region

作　　者：李占奎[1] 徐树威[1] 谢元祥[1] 马瑞昌[1] 

机构地区：[1]中国科学院近代物理研究所

出　　处：《原子核物理评论》1998年第2期82-87,共6页Nuclear Physics Review

基　　金：国家自然科学基金;中国科学院八五重大项目

摘　　要：利用与延发质子符合的子核中已知的第一个２＋→０＋（基态）的γ跃迁来鉴别其β延发质子先驱核的方法已在实验中得到证实，并在兰州重离子加速器ＳＦＣ上用氦喷嘴快速带传输系统成功地合成与研究了沿Ｚ＝０．７４３Ｎ＋１１．６质子滴线分布的稀土区新β延发质子先驱核１３５Ｇｄ和１２１Ｃｅ．该鉴别方法在缺中子稀土区新核素合成中将具有很大的应用前景．It′s more and more difficult to synthesis and study new nuclei along the proton dripline by using online isotope separator because of its low efficiency. A specific method of “pγ” coincidence measurement, using the known lowlying “2+→0+(ground state)” γ transition of the “daughter” nucleus in coincidence with its βdelayed proton, could increase the detection sensitivity effectively and was used to identify and study the precursors, new nuclei135Gd and 121Ce with a Hejet recoil fast tape transport system at HIRFL in China. It′s prospected to synthesis and study more nuclei along the proton dripline of Z=0.743N+11.6 in the rareearth region　by　this technique.

关 键 词：p-γ符合 延发质子先驱核 新核素合成 滴线区 

分 类 号：O571.3[理学—粒子物理与原子核物理]