摘要
用５０ＭｅＶ／ｕ１８Ｏ离子照射厚天然铀靶，用ＨＰＧｅ探测器测量化学分离后的Ｐａ样品源，观察到了２３９Ｐａ的β－衰变子体２３９Ｕ的７４．６６ｋｅＶγ射线的生长和衰变，首次鉴定了新丰中子核素２３９Ｐａ，并确定了２３９Ｐａ的半衰期为（１０６±３０）ｍｉｎ。
nat U targets are irradiated with 50 MeV/u 18 O ions.The Pa sample sources separated chemically are measured using a HPGe detector.A new neutron rich isotope, 239 Pa,has been identified for the first time by observation of the growth and decay of 239 U daughter.The half life of 239 Pa has been determined to be (106±30)min.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
1997年第1期1-4,共4页
Journal of Nuclear and Radiochemistry
关键词
化学分离
转移反应
核素
镤
Pa Chemical separation Transfer reaction
