COSMOGENIC^(10)Be,NOBLE GASES AND IRRADIATION HISTORY OF CHONDRITES ZHAODONG,NAN YANG PAO,LUNAN AND ZAOYANG  

作　　者：易惟熙 沈承德 王道德 O.EUGSTER J.BEER M.SUTER W.WOLFLI 

机构地区：[1]Institute of Geochemistry,Academia Sinica,Guiyang [2]Physikalisches Institut,Universitt Bern,Switzerland [3]Institut für Mittelenergiephysik,ETH Zürich,Switzerland

出　　处：《Chinese Science Bulletin》1989年第5期426-430,共5页

摘　　要：¹⁰Be is mainly produced in meteorite by spallation reactions of cosmic ray particles with oxygen, magnesium, silicon or nitrogen in it. The threshold energy is above 500 MeV. The half lifetime of ¹⁰Be in between ²⁶Al and ⁵³Mn is 1.6 Ma. Thus the possibility of routine determination of ¹⁰Be in a large number of meteorites constitutes an improvement in studying the exposure conditions of

关 键 词：CHONDRITE cosmogenic nuclide cosmic-ray exposure age 

分 类 号：N[自然科学总论]