Study of Proton Resonances in 22Mg by Resonant Elastic Scattering of 21Na+p and Its Astrophysical Implication in 18Ne(α,p)21Na Reaction Rate

摘要：

Proton resonant states in 22Mg have been investigated by the resonant elastic scattering of 21Na+p.The 21Na beam with a mean energy of 4.00 MeV/u was separated by the CNS radioactive ion beam separator(CRIB) and bombarded a thick(CH2),target.The energy spectra of recoiled protons were measured at scattering angles of θcm～172° and 146°,respectively.A new state at 7.06 MeV has been observed clearly and another new one at 7.28 MeV is tentatively identified due to its low statistics.The proton resonant parameters were deduced from an R-matrix analysis of the differential cross section data.The astrophysical resonant reaction rate for the 18Ne(α,p) 21Na reaction has been estimated,and it is about five times larger than that assumed before.

关键词： nuclear astrophysics reaction rate nuclear structure and property

作者: HE Jian-jun H.Iwasaki Y.Yanagisawa N.Hokoiwa M.Kibe J.H.Lee S.Kato Y.Gono C.S.Lee S.Kubono T.Teranishi M.Notani H.Baba S.Nishimura J.Y.Moon M.Nishimura S.Michimasa

作者单位: Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China Center for Nuclear Study,University of Tokyo(CNS),Wako Branch,2-1 Hirosawa,Wako,Saitama 351-0198,Jap RIKEN(The Institute of Physical and Chemical Research),2-1 Hirosawa,Wako,Saitama 351-0198,Japan Department of Physics,Kyushu University,6-10-1 Hakozaki,Fukuoka 812-8581,Japan Department of Physics,Chung-Ang University,Seoul 156-756,Republic of Korea Department of Physics,Yamagata University,Yamagata 990-8560,Japan Center for Nuclear Study,University of Tokyo(CNS),Wako Branch,2-1 Hirosawa,Wako,Saitama 351-0198,Jap Center for Nuclear Study,University of Tokyo(CNS),Wako Branch,2-1 Hirosawa,Wako,Saitama 351-0198,Jap

会议类型: 国际会议

会议名称: 3rd China-Japan-Korea Hadron and Nuclear Physics 2008 Symposium(第三届中日韩强子物理与核物理研讨会)

会议地点: 兰州

会议语种:英文

页码: 153-157

在线出版日期: 2008-06-23（万方平台首次上网日期，不代表论文的发表时间）