Probing the Dissipation Mechanism in Ternary Reactions of ^197Au＋^197Au by Mean Free Path of Nucleons  

作　　者：田俊龙 李贤 晏世伟 吴锡真 李祝霞 

机构地区：[1]College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 [2]Beijing Radiation Center, Beijing 100875 [3]Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000 [4]China Institute of Atomic Energy, Beijing 102413

出　　处：《Chinese Physics Letters》2009年第8期86-89,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 10475008, 10675172 and 10875031, and Ministry of Personnel under Grant No MOP2006138 and Ministry of Education of China under Grant No MOE2005383 and the Major State Basic Research Program under Grant No 2007CB209900.

摘　　要：the collision of very heavy nuclei ^197Au＋^197Au at 15AMeV has been studied within the improved quantum molecular dynamics model. A class of ternary events satisfying nearly complete balance of mass numbers is selected. The experimental mass distributions for the system ^197Au＋^197Au ternary fission fragments, the heaviest（A1）, the intermediate （A2） and the lightest （A3）, are reproduced well. The mean free path of nucleons in the reaction system is studied and the shorter mean free path is responsible for the ternary fission with three mass comparable fragments, in which the two-body dissipation mechanism plays a dominant role.the collision of very heavy nuclei ^197Au＋^197Au at 15AMeV has been studied within the improved quantum molecular dynamics model. A class of ternary events satisfying nearly complete balance of mass numbers is selected. The experimental mass distributions for the system ^197Au＋^197Au ternary fission fragments, the heaviest（A1）, the intermediate （A2） and the lightest （A3）, are reproduced well. The mean free path of nucleons in the reaction system is studied and the shorter mean free path is responsible for the ternary fission with three mass comparable fragments, in which the two-body dissipation mechanism plays a dominant role.

分 类 号：O614.338[理学—无机化学] P173[理学—化学]