Isospin Effects on Multifragmentation in Reactions of 112)Sn+112Sn and 124Sn+124Sn at 40MeV/u

  • Within the framework of an IQMD model, multifragmentation in reactions of 112Sn+112Sn and 124Sn+124Sn at 40MeV/u is investigated. The calculated results are in qualitative agreement with the experimental data. Sighficantly different scalings of the mean IMF multiplicties with neutron, charged-particle, light charged-particle multiplicities, and Zbound are observed for the two reactions. In addition, Comparing with the results of expanding evaporating source model and an isospin-dependent percolation model, it is found that the isospin dependence of multifragmentation mainly results from the isospin dependent reaction dynamics.
  • [1] ZHANG F S, GE L X. Nuclear Multifragmentation(in Chinese). Beijing: Science Press, 1998(张丰收,葛凌霄原子核多重碎裂北京:科学出版社,1998)2 Hann D,Stocker H. Nucl. Phys., 1988, A476: 718–772 3 ZHANG F S. Z. Phys., 1996,A356: 163–1704 CHEN L W, GE L X, ZHANG F S. High Energy Phys. and Nucl. Phys. (in Chinese), 1997, 21 (11): 1018–1023(陈列文,葛凌霄,张丰收高能物理与核物理,1997,21(11):1018—1023)5 ZHAN W L,GUO Z Y,LIU G H et al. Radioactive Ion Beam Line in Lanzhou,Science in China,A, 1999(in press)6 Kubo T et al. Nucl. Instrum. Methods in Phys. Res., 1992,B70:309–319 7 Geissel H et al. Nucl. Instrum. Metals In Phys. Res., 1992,B70:286–297 8 Mueller A C,Anne R. Nucl. Instrum. Methods in Phys. Res., 1991,B56/57: 559–563 9 Sherrill B M et al. Nucl. Instrum. Methods in Phys. Res., 1991,B56/57: 1106–111010 Kunde G J,Gaff S J,Gelbke C K et al. Phys. Rev. Lett., 1996,77(14):2897–290011 Kortemeyer G,Bauer W, Kunde G J. Phys. Rev., 1997,C55(5): 2730–273312 CHEN L W,ZHANG F S,JIN G M. Phys. Rev., 1998,C58(4):2283–2291 13 CHEN L W,ZHANG X D,GE L X. High Energy Phys. and Nucl. Phys. (in Chinese),1996,20(12): 1091–1096(陈列文,张晓东,葛凌霄.高能物理与核物理,1996,20(12):1091—1096)14 CHEN L W,GE L X,ZHANG X D et al. J. Phys., 1997,G23:211–218 15 CHEN L W,ZHANG F S,ZENG X H et al. High Energy Phys. and Nucl. Phys. (in Chinese), 1998,22(11): 1035–1041(陈列文,张丰收,曾样华等.高能物理与核物理,1998,22(11):1035—1041) 16 ZHU Z Y, SHEN W Q,CAI Y H et al. Phys. Lett.,1994,B328: 1–4 17 Lalazissis G A, Konig J,Ring P. Phys. Rev., 1997,C55(1): 540–54318 ZHANG F S,Suraud E. Phys. Rev., 1995,C51(6):3201–3210 19 Wada R,Hildenbrand K D, Lynen U et al. Phys. Rev. Lett., 1987,58(18): 1829–183220 Lozhkin O V,Trautrnann W, Phys. Rev., 1992,C46(5): 1996–200121 Dempsey J F,Charity J F,Sobotka L G et al. Phys. Rev., 1996,C54(4): 1710–171922 Lynen, Kreutz P,Adloff J C et al. Nucl. Phys., 1992, A545: 329c–340c
  • [1] ZHANG F S, GE L X. Nuclear Multifragmentation(in Chinese). Beijing: Science Press, 1998(张丰收,葛凌霄原子核多重碎裂北京:科学出版社,1998)2 Hann D,Stocker H. Nucl. Phys., 1988, A476: 718–772 3 ZHANG F S. Z. Phys., 1996,A356: 163–1704 CHEN L W, GE L X, ZHANG F S. High Energy Phys. and Nucl. Phys. (in Chinese), 1997, 21 (11): 1018–1023(陈列文,葛凌霄,张丰收高能物理与核物理,1997,21(11):1018—1023)5 ZHAN W L,GUO Z Y,LIU G H et al. Radioactive Ion Beam Line in Lanzhou,Science in China,A, 1999(in press)6 Kubo T et al. Nucl. Instrum. Methods in Phys. Res., 1992,B70:309–319 7 Geissel H et al. Nucl. Instrum. Metals In Phys. Res., 1992,B70:286–297 8 Mueller A C,Anne R. Nucl. Instrum. Methods in Phys. Res., 1991,B56/57: 559–563 9 Sherrill B M et al. Nucl. Instrum. Methods in Phys. Res., 1991,B56/57: 1106–111010 Kunde G J,Gaff S J,Gelbke C K et al. Phys. Rev. Lett., 1996,77(14):2897–290011 Kortemeyer G,Bauer W, Kunde G J. Phys. Rev., 1997,C55(5): 2730–273312 CHEN L W,ZHANG F S,JIN G M. Phys. Rev., 1998,C58(4):2283–2291 13 CHEN L W,ZHANG X D,GE L X. High Energy Phys. and Nucl. Phys. (in Chinese),1996,20(12): 1091–1096(陈列文,张晓东,葛凌霄.高能物理与核物理,1996,20(12):1091—1096)14 CHEN L W,GE L X,ZHANG X D et al. J. Phys., 1997,G23:211–218 15 CHEN L W,ZHANG F S,ZENG X H et al. High Energy Phys. and Nucl. Phys. (in Chinese), 1998,22(11): 1035–1041(陈列文,张丰收,曾样华等.高能物理与核物理,1998,22(11):1035—1041) 16 ZHU Z Y, SHEN W Q,CAI Y H et al. Phys. Lett.,1994,B328: 1–4 17 Lalazissis G A, Konig J,Ring P. Phys. Rev., 1997,C55(1): 540–54318 ZHANG F S,Suraud E. Phys. Rev., 1995,C51(6):3201–3210 19 Wada R,Hildenbrand K D, Lynen U et al. Phys. Rev. Lett., 1987,58(18): 1829–183220 Lozhkin O V,Trautrnann W, Phys. Rev., 1992,C46(5): 1996–200121 Dempsey J F,Charity J F,Sobotka L G et al. Phys. Rev., 1996,C54(4): 1710–171922 Lynen, Kreutz P,Adloff J C et al. Nucl. Phys., 1992, A545: 329c–340c
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ZHANG FengShou, CHEN LieWen, MING ZhaoYu and ZHU ZhiYuan. Isospin Effects on Multifragmentation in Reactions of 112)Sn+112Sn and 124Sn+124Sn at 40MeV/u[J]. Chinese Physics C, 2000, 24(3): 238-243.
ZHANG FengShou, CHEN LieWen, MING ZhaoYu and ZHU ZhiYuan. Isospin Effects on Multifragmentation in Reactions of 112)Sn+112Sn and 124Sn+124Sn at 40MeV/u[J]. Chinese Physics C, 2000, 24(3): 238-243. shu
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Received: 1999-01-08
Revised: 1900-01-01
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Isospin Effects on Multifragmentation in Reactions of 112)Sn+112Sn and 124Sn+124Sn at 40MeV/u

    Corresponding author: ZHANG FengShou,
  • Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China2 Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China3 Shanghai Institute of Nuclear Research, The Chinese Academy of Shanghai, 201800, China4 CCASTWorld Laboratory P.O.Box 8730,Beijing 100080, China

Abstract: Within the framework of an IQMD model, multifragmentation in reactions of 112Sn+112Sn and 124Sn+124Sn at 40MeV/u is investigated. The calculated results are in qualitative agreement with the experimental data. Sighficantly different scalings of the mean IMF multiplicties with neutron, charged-particle, light charged-particle multiplicities, and Zbound are observed for the two reactions. In addition, Comparing with the results of expanding evaporating source model and an isospin-dependent percolation model, it is found that the isospin dependence of multifragmentation mainly results from the isospin dependent reaction dynamics.

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