Disappearance of flow and the in-medium nucleon-nucleon cross section for Zn-64+Al-27 collisions at intermediate energies

	Disappearance of flow and the in-medium nucleon-nucleon cross section for Zn-64+Al-27 collisions at intermediate energies
	He, ZY ; Angelique, JC ; Auger, A ; Bizard, G ; Brou, R ; Buta, A ; Cabot, C ; Crema, E ; Cussol, D ; Dai, GX
刊名	NUCLEAR PHYSICS A
	1996-02-26
卷号	598 页码:248-262
ISSN号	0375-9474
英文摘要	Light charged particles emitted from the reactions Zn-64+Al-27 at beam energies 49, 57, 69 and 79 MeV/u have been measured with a 4 pi multidetector array. The collective transverse momentum in the reaction plane (in-plane flow) is observed to vary strongly with the impact parameter and the emitted fragments. The flow parameter decreases monotonically from 49 to 79 MeV/u and falls to zero at a beam energy about 79 MeV/u in central collisions. This energy of vanishing flow increases with impact parameter and may be the same for different fragments. The disappearance of flow is also studied with the Boltzmann-Uehling-Uhlenbeck equation and it is demonstrated that the flow parameter and E(VF) are very sensitive to the in-medium cross section sigma(NN) and weakly sensitive to the nuclear compressibility in central collisions. Comparisons with experimental data indicate that sigma(NN) is around 35 to 45 mb in central collisions.
WOS关键词	HEAVY-ION COLLISIONS ; REACTION PLANE DETERMINATION ; COLLECTIVE MOTION ; MEAN FIELD ; DISTRIBUTIONS ; DEFLECTION ; MATTER ; MEV/U ; MASS
WOS研究方向	Physics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:A1996UA66100005
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/56536]
专题	中国科学院近代物理研究所
通讯作者	He, ZY
作者单位	1.UNIV CAEN,IN2P3,CNRS,F-14050 CAEN,FRANCE 2.ACAD SINICA,INST MODERN PHYS,LANZHOU 730000,PEOPLES R CHINA 3.GANIL,F-14021 CAEN,FRANCE 4.UNIV CATHOLIQUE LOUVAIN,INST PHYS NUCL,B-1348 LOUVAIN,BELGIUM 5.SUBATECH,F-44072 NANTES,FRANCE 6.TEXAS A&M UNIV,INST CYCLOTRON,COLLEGE STN,TX 77843 7.ACAD SINICA,INST NUCL RES,SHANGHAI 201800,PEOPLES R CHINA 8.UNIV NAPLES,DIPARTIMENTO SCI FIS,I-80125 NAPLES,ITALY
推荐引用方式 GB/T 7714	He, ZY,Angelique, JC,Auger, A,et al. Disappearance of flow and the in-medium nucleon-nucleon cross section for Zn-64+Al-27 collisions at intermediate energies[J]. NUCLEAR PHYSICS A,1996,598:248-262.
APA	He, ZY.,Angelique, JC.,Auger, A.,Bizard, G.,Brou, R.,...&Zhang, FS.(1996).Disappearance of flow and the in-medium nucleon-nucleon cross section for Zn-64+Al-27 collisions at intermediate energies.NUCLEAR PHYSICS A,598,248-262.
MLA	He, ZY,et al."Disappearance of flow and the in-medium nucleon-nucleon cross section for Zn-64+Al-27 collisions at intermediate energies".NUCLEAR PHYSICS A 598(1996):248-262.