多普勒能移反冲距离法测核寿命的技术  

An apparatus for nuclear lifetime measurement with recoil-distance Doppler-shift method

作　　者：陈新峰[1] 郭应祥[1] 孙相富[1] 雷祥国[1] 周晓红[1] 刘忠[1] 金寒涓 刘明义[1] 罗亦孝[1] 

机构地区：[1]中国科学院近代物理研究所

出　　处：《核技术》1996年第8期466-472,共7页Nuclear Techniques

摘　　要：自行研制了多普勒能移反冲距离法测量寿命的装置，对装置的性能作了测试，并首次在国内用于核实验。用３１Ｐ轰击９３Ｎｂ靶测得了１２０Ｘｅ基带能级寿命及１２１Ｃｓ和１１７Ｉ的部分能级的寿命。实验结果表明，用多普勒能移反冲距离法能测量１０－１２－１０－９ｓ范围核激发态寿命。The recoil-distance Doppler-shift (RDDS) methods is an accurate and direct method to measure lifetime of nuclear levels in 10-12-10-9s range. An apparatus based on the RDDS method was designed and tested. An in-beam experiment with the apparatus was first performed in China. Lifetimes were measured for the levels of 120Xe ground band and a few levels of 121Cs and 117I which are produced by bombardment on 93Nb target with 31p beam.

关 键 词：多普勒能移 反冲距离法 核能级 寿命 

分 类 号：O562.6[理学—原子与分子物理]