Experimental research into the two-proton emissions from 17,18Ne, 28P and 28,29S |
| |
Authors: | Lin ChengJian Xu XinXing Jia HuiMing Yang Feng Jia Fei Wu ZhenDong Zhang ShiTao Liu ZuHua Zhang HuanQiao Xu HuShan Sun ZhiYu Wang JianSong Hu ZhengGuo Wang Meng Chen RuoFu Zhang XueYing Li Chen Lei XiangGuo Xu ZhiGuo Xiao GuoQing Zhan WenLong |
| |
Affiliation: | 1.China Institute of Atomic Energy,Beijing,China;2.Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou,China |
| |
Abstract: | Two-proton emissions from the excited states of 17,18Ne, 28P and 28,29S were investigated experimentally by the radioactive beams bombarding on the 197Au target via the Coulomb excitation. The complete-kinematics measurements were actualized by the stacks of silicon-strip detectors and CsI+PIN array detectors. The invariant mass of final systems as well as the relative momentum, opening angle, and relative energy of the two emitted protons was reconstructed under the framework of relativistic kinematics. Visible proton-proton correlations were observed in these systems. The mechanisms of two-proton emission were analyzed in a simple schematic model, in which the extreme decay modes like 2He cluster emission, three-body phase-space decay, and two-body sequential decay were taken into account. With the help of Monte-Carlo simulations, the two protons emitted from the 6.15 MeV excited state of 18Ne and the excited states in the energy region of 9.6–10.4 MeV of 29S, respectively, exhibited prominent features of 2He cluster decay while for the other cases, no obvious diproton emissions were observed. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|