Experimental reconstruction of primary hot isotopes and characteristic properties of the fragmenting source in heavy-ion reactions near the Fermi energy

doi:10.1103/PhysRevC.90.044603

CORC > 近代物理研究所 > 中国科学院近代物理研究所 > 兰州重离子研究装置

	Experimental reconstruction of primary hot isotopes and characteristic properties of the fragmenting source in heavy-ion reactions near the Fermi energy
	Hagel, K 1; Lin, W (reprint author), Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China.; Zheng, H 1,2; Sahu, PK 1; Qin, L 1; Materna, T 1; Natowitz, JB 1; Bonasera, A 1,9; Bottosso, C 1; Kowalski, S 6
刊名	PHYSICAL REVIEW C
	2014
卷号	90 页码:044603
关键词	Antisymmetrized Molecular-dynamics N-body Approach Statistical Multifragmentation Nuclear Multifragmentation Detection Efficiency Collisions Equation Challenges Emission Physics
ISSN号	0556-2813
DOI	10.1103/PhysRevC.90.044603
英文摘要	The characteristic properties of the hot nuclear matter existing at the time of fragment formation in multifragmentation events produced in the reaction Zn-64 + Sn-112 at 40 MeV/nucleon are studied. A kinematical focusing method is employed to determine the multiplicities of evaporated light particles, associated with isotopically identified intermediate-mass fragments. From these data the primary isotopic yield distributions are reconstructed using a Monte Carlo method. The reconstructed yield distributions are in good agreement with the primary isotope distributions obtained from antisymmetrized molecular dynamics transport model simulations. Utilizing the reconstructed yields and power distribution, characteristic properties of the emitting source are examined. The primary mass distribution exhibits a power-law distribution with the critical exponent A(-2.3) for A >= 15 isotopes but significantly deviate from that for lighter isotopes. Based on the modified Fisher model, the ratios of the Coulomb and symmetry energy coefficients relative to the temperature, a(c)/T and a(sym)/T, are extracted as a function of A. The extracted a(sym)/T values are compared with results of the antisymmetrized molecular dynamics simulations using Gogny interactions with different density dependencies of the symmetry energy term. The calculated a(sym)/T values show a close relation to the symmetry energy at the density at the time of fragment formation. From this relation the density of the fragmenting source is determined to be rho/rho(0) = 0.63 +/- 0.03. Using this density, the symmetry energy coefficient and the temperature of fragmenting source are determined in a self-consistent manner as a(sym) = 24.7 +/- 3.4 MeV and T = 4.9 +/- 0.2 MeV.
资助项目	ADS Project 302 of the Chinese Academy of Sciences[XDA03030200]
WOS关键词	ANTISYMMETRIZED MOLECULAR-DYNAMICS ; N-BODY APPROACH ; STATISTICAL MULTIFRAGMENTATION ; NUCLEAR MULTIFRAGMENTATION ; DETECTION EFFICIENCY ; COLLISIONS ; EQUATION ; CHALLENGES ; EMISSION ; PHYSICS
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000344102800004
资助机构	US Department of Energy ; US Department of Energy ; Robert A. Welch Foundation ; Robert A. Welch Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.impcas.ac.cn/handle/113462/23381]
专题	近代物理研究所_兰州重离子研究装置近代物理研究所_实验物理中心
通讯作者	Lin, W (reprint author), Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China.
作者单位	1.Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USA 2.Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA 3.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Univ Sao Paulo, Inst Fis, BR-05389970 Sao Paulo, Brazil 6.Silesian Univ, Inst Phys, PL-40007 Katowice, Poland 7.Catholic Univ Louvain, FNRS, B-1348 Louvain, Belgium 8.Catholic Univ Louvain, IPN, B-1348 Louvain, Belgium 9.Ist Nazl Fis Nucl, Lab Naz Sud, I-95123 Catania, Italy
推荐引用方式 GB/T 7714	Hagel, K,Lin, W ,Zheng, H,et al. Experimental reconstruction of primary hot isotopes and characteristic properties of the fragmenting source in heavy-ion reactions near the Fermi energy[J]. PHYSICAL REVIEW C,2014,90:044603.
APA	Hagel, K.,Lin, W .,Zheng, H.,Sahu, PK.,Qin, L.,...&Rodrigues, MRD.(2014).Experimental reconstruction of primary hot isotopes and characteristic properties of the fragmenting source in heavy-ion reactions near the Fermi energy.PHYSICAL REVIEW C,90,044603.
MLA	Hagel, K,et al."Experimental reconstruction of primary hot isotopes and characteristic properties of the fragmenting source in heavy-ion reactions near the Fermi energy".PHYSICAL REVIEW C 90(2014):044603.