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

doi:10.1142/S0217732311034876

	ANGULAR DISTRIBUTIONS OF FRAGMENTS PRODUCED IN TERNARY REACTION OF Au-197+Au-197 AT 15 A MeV
	Li, Xian 1; Tian, Junlong 2; Yan, Shiwei 1,3; Cheng, Jinxia 1; Jiang, Xiang 1
刊名	MODERN PHYSICS LETTERS A
	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
DOI	10.1142/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.
资助项目	Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Personnel[MOP2006138]
WOS关键词	DISSIPATION MECHANISM ; SYSTEM AU-197+AU-197 ; COLLISIONS ; FISSION ; ENERGIES
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	WORLD SCIENTIFIC PUBL CO PTE LTD
WOS记录号	WOS:000287666900008
内容类型	期刊论文
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.