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ANGULAR DISTRIBUTIONS OF FRAGMENTS PRODUCED IN TERNARY REACTION OF Au-197+Au-197 AT 15 A MeV

文献类型：期刊论文

作者Li, Xian1; Tian, Junlong2; Yan, Shiwei1,3; Cheng, Jinxia1; Jiang, Xiang1
刊名MODERN PHYSICS LETTERS A
出版日期2011-02-28
卷号26页码:449-460
关键词Au-197+Au-197 ternary reaction angular distribution
ISSN号0217-7323
DOI10.1142/S0217732311034876
英文摘要Angular distributions of fragments have been studied for Au-197 + Au-197 ternary reactions at bombarding energy 15 A MeV by an improved quantum molecular dynamics model. The calculated results are qualitatively in agreement with the experimental data. Through analyzing the angular distributions of fragments, it is shown that in semi-peripherals collisions Au-197 + Au-197 interacting system often reseparates into three massive fragments which are almost aligned in space along the separation axis. The anisotropic distribution in azimuthal angle phi shows that the projectile-like fragment (PLF) or target-like fragment (TLF) breaks up violently, reflecting nonequilibrium effects in the consecutive reseparation. The time scale elapsing from the scission of the binary PLF+TLF system to the secondary scission of PLF or TLF is estimated to be of about 80 fm/c. It is found that the distribution in Theta(cm) depends on the impact parameter, and its peak seems to be moving and narrowing with increasing impact parameter. Its asymptotic peak value is in agreement with the grazing angle. The shift of the peak value of Theta(cm) implies that the collective energy dissipation depends on impact parameter and decreases with impact parameter increasing since the exchange nucleons becomes less frequent during the reaction process.
WOS关键词DISSIPATION MECHANISM ; SYSTEM AU-197+AU-197 ; COLLISIONS ; FISSION ; ENERGIES
资助项目Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Personnel[MOP2006138]
WOS研究方向Astronomy & Astrophysics ; Physics
语种英语
WOS记录号WOS:000287666900008
出版者WORLD SCIENTIFIC PUBL CO PTE LTD
源URL[http://119.78.100.186/handle/113462/57000]  
专题中国科学院近代物理研究所
通讯作者Yan, Shiwei
作者单位1.Beijing Normal Univ, Coll Nucl Sci & Technol, Beijing 100875, Peoples R China
2.Anyang Normal Univ, Coll Phys & Elect Engn, Anyang 455000, Peoples R China
3.Natl Lab Heavy Ion Accelerator Lanzhou, Ctr Theoret Phys, Lanzhou 730000, Peoples R China
推荐引用方式
GB/T 7714		 Li, Xian,Tian, Junlong,Yan, Shiwei,et al. ANGULAR DISTRIBUTIONS OF FRAGMENTS PRODUCED IN TERNARY REACTION OF Au-197+Au-197 AT 15 A MeV[J]. MODERN PHYSICS LETTERS A,2011,26:449-460.
APA Li, Xian,Tian, Junlong,Yan, Shiwei,Cheng, Jinxia,&Jiang, Xiang.(2011).ANGULAR DISTRIBUTIONS OF FRAGMENTS PRODUCED IN TERNARY REACTION OF Au-197+Au-197 AT 15 A MeV.MODERN PHYSICS LETTERS A,26,449-460.
MLA Li, Xian,et al."ANGULAR DISTRIBUTIONS OF FRAGMENTS PRODUCED IN TERNARY REACTION OF Au-197+Au-197 AT 15 A MeV".MODERN PHYSICS LETTERS A 26(2011):449-460.

入库方式： OAI收割

来源：近代物理研究所

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