新丰中子同位素^(208)Hg  

New Neutron-Rich Isotope ^(208)Hg

作　　者：张立[1] 靳根明[1] 赵进华[1] 杨维凡[1] 杨永峰[1] 赵之正[1] 郑纪文[1] 孙秀荣[1] 李宗伟[1] 秦芝[1] 王积成[1] 郭光辉[1] 

机构地区：[1]中国科学院近代物理研究所,兰州730000

出　　处：《高能物理与核物理》1992年第8期767-768,共2页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金;中国科学院重大项目基金

摘　　要：本文报道了新丰中子同位素^(208)Hg的合成、鉴别及半衰期测定。The new neutron-rich isotope ^(208)Hg has been identified for the first time from the reaction products in fully-stopping thick ^(nat)Pb target bombarded by 30 MeV/u ^(12)C beam provided by the Heavy Ion Research Facility in Lanzhou. Assignment of the nuclide ^(208)Hg was based on the measurements of the deacy γ energy and halflife of its daughter ^(208)Tl, which was grown up with ^(208)Hg β^-deacy. The half-life of ^(208)Hg β^- deacy was determined to be 42_(12)^(+23) min. The average production cross Section of ^(208)Hg over the incident energy region from Coulomb barrier to 30 MeV/u is found to be 1.14±0.5 μb.

关 键 词：同位素 半衰期 合成 汞208 

分 类 号：O562.6[理学—原子与分子物理]