Power law behavior of the isotope yield distributions in the multifragmentation regime of heavy ion reactions

doi:10.1103/PhysRevC.82.054602

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	Power law behavior of the isotope yield distributions in the multifragmentation regime of heavy ion reactions
	Keutgen, T.4,5; Kowalski, S.6; Chen, Z.1,3; Wada, R.3; Huang, M.1,2,3; Wang, J.1; Schmidt, K. J.3; Sahu, P. K.3; Rodrigues, M. R. D.3; Qin, L.3
刊名	PHYSICAL REVIEW C
	2010-11-04
卷号	82 期号:5 页码:7
ISSN号	0556-2813
DOI	10.1103/PhysRevC.82.054602
英文摘要	Isotope yield distributions in the multifragmentation regime were studied with high-quality isotope identification, focusing on the intermediate mass fragments (IMFs) produced in semiviolent collisions. The yields were analyzed within the framework of a modified Fisher model. Using the ratio of the mass-dependent symmetry energy coefficient relative to the temperature, a(sym)/T, extracted in previous work and that of the pairing term, a(p)/T, extracted from this work, and assuming that both reflect secondary decay processes, the experimentally observed isotope yields were corrected for these effects. For a given I = N - Z value, the corrected yields of isotopes relative to the yield of C-12 show a power law distribution Y (N, Z)/Y(C-12) similar to A(-tau) in the mass range 1 <= A <= 30, and the distributions are almost identical for the different reactions studied. The observed power law distributions change systematically when I of the isotopes changes and the extracted tau value decreases from 3.9 to 1.0 as I increases from -1 to 3. These observations are well reproduced by a simple deexcitation model, with which the power law distribution of the primary isotopes is determined to be tau(prim) = 2.4 +/- 0.2, suggesting that the disassembling system at the time of the fragment formation is indeed at, or very near, the critical point.
资助项目	US Department of Energy[DE-FG03-93ER40773] ; Robert A. Welch Foundation[A0330] ; Chinese Academy of Sciences
WOS关键词	ANTISYMMETRIZED MOLECULAR-DYNAMICS ; PROTON-NUCLEUS INTERACTIONS ; FRAGMENT PRODUCTION ; COLLISIONS ; SYSTEMATICS ; MODELS
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000283842900003
资助机构	US Department of Energy ; Robert A. Welch Foundation ; Chinese Academy of Sciences
公开日期	2011-04-20
内容类型	期刊论文
源URL	[http://ir.imp.cas.cn/handle/113462/7841]
专题	近代物理研究所_近代物理研究所知识存储（2010之前）
通讯作者	Huang, M.
作者单位	1.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USA 4.Catholic Univ Louvain, FNRS, B-1348 Louvain, Belgium 5.Catholic Univ Louvain, IPN, B-1348 Louvain, Belgium 6.Silesia Univ, Inst Phys, Katowice, Poland 7.Ist Nazl Fis Nucl, Lab Nazl Sud, I-95123 Catania, Italy
推荐引用方式 GB/T 7714	Keutgen, T.,Kowalski, S.,Chen, Z.,et al. Power law behavior of the isotope yield distributions in the multifragmentation regime of heavy ion reactions[J]. PHYSICAL REVIEW C,2010,82(5):7.
APA	Keutgen, T..,Kowalski, S..,Chen, Z..,Wada, R..,Huang, M..,...&Hagel, K..(2010).Power law behavior of the isotope yield distributions in the multifragmentation regime of heavy ion reactions.PHYSICAL REVIEW C,82(5),7.
MLA	Keutgen, T.,et al."Power law behavior of the isotope yield distributions in the multifragmentation regime of heavy ion reactions".PHYSICAL REVIEW C 82.5(2010):7.