Determination of the cluster spectroscopic factor of the 10.3 MeV state in ^(12)Be  

作　　者：YANG ZaiHong YE YanLin LI ZhiHuan LOU JianLin XU FuRong PEI JunCheng TIAN ZhengYang LI KuoAng SUN YeLei CHEN Jie LI Jing JIANG Wei YANG Biao CHEN SiDong LIU Qiang ZANG HongLiang FENG Jun YIN ZheWei 

机构地区：[1]State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University

出　　处：《Science China(Physics,Mechanics & Astronomy)》2014年第9期1613-1617,共5页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Basic Research Program of China(Grant No.2013CB834402);the National Natural Science Foundation of China(Grant Nos.11035001,11275011,11235001,11320101004 andJ1103206)

摘　　要：From an inelastic excitation and breakup experiment with a12Be beam at 29 MeV/u,a large4He+8He cluster decay width of 1.1(2)MeV is determined for a state at an excitation energy of 10.3 MeV and with a spin parity of 0+.By using the R-matrix analysis,a cluster spectroscopic factor of 0.53(10)is extracted from the cluster partial width,providing a strong support for the clustering structure in12Be.A specially designed zero-degree telescope played an essential role in the present experiment and has been demonstrated to be a promising tool in future studies of the molecular-like resonances near the cluster separation threshold.From an inelastic excitation and breakup experiment with a ^12Be beam at 29 MeV/u,a large^4He＋^8He cluster decay width of 1.1（2）MeV is determined for a state at an excitation energy of 10.3 MeV and with a spin parity of 0＋.By using the R-matrix analysis,a cluster spectroscopic factor of 0.53（10）is extracted from the cluster partial width,providing a strong support for the clustering structure in^12Be.A specially designed zero-degree telescope played an essential role in the present experiment and has been demonstrated to be a promising tool in future studies of the molecular-like resonances near the cluster separation threshold.

关 键 词：CLUSTER decay width R-MATRIX 

分 类 号：O433[机械工程—光学工程]