Temperature and excitation energy of hot nuclei in the reaction of Ar-40+Au-197 at 25 MeV/nucleon

	Temperature and excitation energy of hot nuclei in the reaction of Ar-40+Au-197 at 25 MeV/nucleon
	Wu, H; Jin, G; Li, Z; Dai, G; Qi, Y; He, Z; Luo, Q; Duan, L; Wen, W; Zhang, B
刊名	NUCLEAR PHYSICS A
	1997-05-12
卷号	617 页码:385-394
关键词	Au-197(Ar-40,X) E = 25 MeV/nucleon measured fission fragments and coincident light particle deduced nuclear temperature and excitation energy relationship different statistical models
ISSN号	0375-9474
英文摘要	The coincidence measurements between heavy fission fragments and light charged particles with Z less than or equal to 2 were carried out for the Ar-40 + (197)AU reaction at 25 MeV/nucleon, to study the properties of hot nuclei in heavy ion induced reactions, The linear momentum transfers (LMTs) were deduced from the folding angle and the time-of-flight difference between two fission fragments of heavy residues. The relationship of the nuclear temperature (slope parameter of the energy spectrum) and the excitation energy was determined independently from the measurement of the kinetic energy spectra in the frames of the emitting sources and from the LMT analysis. Both the temperature and the excitation energy increase with decreasing impact parameter, which suggests that a plateau temperature of 5.5 MeV is reached at an excitation energy of 3.1 MeV/nucleon. The result was also compared with various statistical models that explain the plateau by the multifragmentation process, where the excitation energy is assumed to be stored in compression and expansion effects. (C) 1997 Elsevier Science B.V.
WOS关键词	GAS PHASE-TRANSITION ; LEVEL-DENSITY ; MULTIFRAGMENTATION ; FRAGMENTATION ; VAPORIZATION ; COLLISIONS ; FISSION ; MODEL ; DECAY ; MEV/U
WOS研究方向	Physics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:A1997WY13100008
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/46852]
专题	中国科学院近代物理研究所
作者单位	CHINESE ACAD SCI,INST MODERN PHYS,LANZHOU 730000,PEOPLES R CHINA
推荐引用方式 GB/T 7714	Wu, H,Jin, G,Li, Z,et al. Temperature and excitation energy of hot nuclei in the reaction of Ar-40+Au-197 at 25 MeV/nucleon[J]. NUCLEAR PHYSICS A,1997,617:385-394.
APA	Wu, H.,Jin, G.,Li, Z.,Dai, G.,Qi, Y.,...&Zhang, B.(1997).Temperature and excitation energy of hot nuclei in the reaction of Ar-40+Au-197 at 25 MeV/nucleon.NUCLEAR PHYSICS A,617,385-394.
MLA	Wu, H,et al."Temperature and excitation energy of hot nuclei in the reaction of Ar-40+Au-197 at 25 MeV/nucleon".NUCLEAR PHYSICS A 617(1997):385-394.