Angular Distributions of Intermediate Mass Fragments Emitted in 30 MeV/u 40Ar Induced Reactions  

作　　者：GOU Quan-bu ZHU Yong-tai XU Hu-shan WEI Zhi-yong LU Jun ZHANG Yu-hu WANG Qi LI Song-lin WU Zhong-li 苟全补;诸永泰;徐瑚珊;魏志勇;卢俊;张玉虎;王琦;李松林;吴钟立(Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000)

机构地区：[1]Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000

出　　处：《Chinese Physics Letters》1999年第2期95-97,共3页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No.19235012;the Foundation of Chinese Academy of Sciences。

摘　　要：The angular distributions of intermediate mass fragments with charge numbers from 3 to 24 emitted in 30 MeV/u 40Ar+58,64Ni and 115In reactions over an angular range of 5o-140ohave been measured.In different angular region an exponential distribution function dσ/dΩ=N exp(-θ/α)was used to fit the measured angular distributions.The decay factor a which can be connected with the interaction time T and the factor N which is related to the intensity of the emission sources have been extracted.The relationship ofα(Z)and N(Z)with Z for different reaction systems and different angular regions has been discussed.The different behavior of dσ/dΩ,α(Z),and N(Z)for the three studied reaction systems exists mainly in the middle and backward angular regions.The dependencies of angular distributions on isospin and the size of reaction systems have also been discussed.

关 键 词：MeV/u ANGULAR BACKWARD 

分 类 号：O57[理学—粒子物理与原子核物理]