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《中国物理C》（英文）编辑部
2024年10月30日
Chinese Physics C> 2002, Vol. 26> Issue(S1) : 63-72 

Role of Momentum Dependent Interaction on the Isospin Effects of Fragmentations and Dissipations at Intermediate Energy Heavy Ion Collisions

  •  Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China2 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China3 Department of Physics, Tianshui Normal College, Gansu Tianshui 741000, China

  • Based on an isospin-dependent quantum molecular dynamics model,the role of the momentum dependent interaction(MDI) on the isopspin effects of fragmentations and dissipations in the intermediate energy heavy ion collisions are studied.It was found that the values of the nuclear stopping,the number of nucleon emissions and the multiplicity of the intermediate mass fragments with MDI are larger than those without MDI. Especially the differences between those quantities with isospin dependent in-medium nucleon-nucleon cross section and those without the isospin independent in-medium nucleon-nucleon cross section (i.e., the isospin effect of in-medium nucleon-nucleon cross section) under MDI are also larger than those differences without MDI in the relative high energy region, which means that the momentum dependent interaction enhances the sensitivities of those quantities to the isospin effect of in-medium nucleon-nucleon cross section at the relative high beam energies.
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    [1] Hussein M S, Rego R A, Bertulani C A. Phys. Rep., 1993,201: 279 2 LI B A, Ko C M, Bauer W. Int. J. Mod. Phys., 1998, E7: 147 3 LI B A, Schroder W U. Isospin. Physics in Heavy–Ion Collisions at Intermediate Energies. New York: Nova Science Publishers, Inc, 2001 4 Bethe H A. Rev. Mod. Phys., 1990, 62: 801 5 Pethick C J, Ravenhall D G. Ann. ReV. Nucl. Part. Sci., 1995,45: 4296 Wada R et al. Phys. Rev. Lett., 1987, 58: 18297 Yennello S J et al. Phys. Lett., 1994, B321: 14; Nucl. Phys., 2001, A681: 317c 8 Pak R et al. Phys. Rev. Lett., 1997,78: 1022;1997,78: 10269 Westfall G D. Nucl. Phys., 1998, A630:27c; 2001, A681: 343c 10 Kunde G J et al. Phys. Rev. Lett, 1996,77: 2897 11 Miller M L et al. Phys. Rev. Lett., 1999, 82: 1399 12 XU H et al. Phys. Rev. Lett., 2000, 85: 716; Tsang M B et al. Phys. Rev. Lett., 2001, 86: 502313 Schroder W U et al. Nucl. Phys., 2001, A681: 418c14 Sobotka L G et al. Phys. Rev., 1994, C55: R1272; 2000,62: 031603 15 Rami F et al. Phys. Rev. Lett., 2000, 84: 1120 16 TAN W P et al. MSUCL–1198, Phys. Rev., 2001, C: to be published 17 Farine M, Sami T, Remaud B et al. Z. Phys., 1991,339: 363 18 Muller H, Serot B D. Phys. Rev., 1995, C52: 207219 LI B A et al Phys. Rev. Lett., 1996, 76: 4492; 1997, 78: 1644; 2000, 85: 4221 20 Kortmeyer G, Bauer W, Kunde G J. Phys. Rev., 1997, C55: 273021 Colonna M et al. Phys. Lett., 1998, B428: 1; Baran V et al. Nucl.Phys., 1998, A632: 287; Toro M D et al. Nucl. Phys., 2001, A681:426c 22 PAN J, Gupta S D. Phys. Rev., 1998, C57: 183923 Chomaz P H, Gulminelli F. Phys. Lett., 1999, B447: 221 24 Hombach A et al. Eur. Phys. J., 1999, A5: 77 25 LIU J Y et al. Nucl. Phys., 2001, A687: 475 26 Klakow D, Welke G, Bauer W. Phys. Rev., 1993, C48: 198227 CHEN K, Fraenkel Z et al. Phys. Rev,, 1968,166: 94928 Aichelin J. Phys. Rep., 1991, 202: 233; Hartnack Ch et al. Euro. J. Nucl. Phys., 1998, A1: 151 29 LI B A. Nucl. Phys., 2001, A681: 434c 30 Aichelin J et al. Phys. Rev. Lett., 1987, 58: 1926 31 Aichelin J et al. Phys. Rev., 1988, C37: 2451 32 Reinhard P G et al. Computational Nuclear Physics, Springer–Verlag, Berlin, 1991, 1: 28–50; Danielewicz, Nucl. Phys., 2000, A673:375 33 Alkahzov G et al. Nucl. Phys., 1977, A280: 365 34 Bertsch G F, Gupta S D. Phys. Rep., 1988,160: 1991 35 Ngo C, Ngo H, Leray S et al. Phys. Rep., 1989, A499: 148 36 Miller M 1, Bjarki O, Magestro D J et al. Phys. Rev. Lett., 1999, 82: 1399 37 LI B A. Phys. Rev., 2001, C64: 054604 38 LI B A. Phys. Rev. Lett., 2000, 85(20) : 4221–422439 LIU H, LIU J Y. Z. Phys., 1996, A345: 31140 Dorso C, Duarte S, Randrup J. Phys. Lett., 1987, B188: 28741 LIU J Y, GUO W J, WANG S J et al. Phys. Rev. Lett., 2001, 86(6) : 975–978; YANG Y F, LIU J Y, ZUO W et al. Chin. Phys. Lett., 2001,18(8) :1040–104342 LIU J Y, ZHAO Q, WANG S J et al. Phys. Rev., 2001, C63: 05461243 LI G O, Machleidt R. Phys. Rev., 1993, C48: 1702 44 LI G O, Machieidt R. Phys.Rev.,1994, C49: 566 45 LI Q F, LI Z X, MAO G J. Phys. Rev., 2000, C62: 6201460646 Lolos G J et al. Phys. Rev. Lett., 1998,80: 241 47 Gale C, Bertsch G, Gupta S D. Phys. Rev., 1987, C35: 1666 48 Jaivir Singh, Suneel Kumar, Rajeev K. Puri. Phys. Rev., 2001, C63: 054603 49 Jaivir Singh, Suneel Kumar, Rajeev K. Puri. Phys. Rev., 2000, C62: 044617

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XING Yong-Zhong, LIU Jian-Ye, GUO Wen-Jun, ZUO Wei and LI Xi-Guo. Role of Momentum Dependent Interaction on the Isospin Effects of Fragmentations and Dissipations at Intermediate Energy Heavy Ion Collisions[J]. Chinese Physics C, 2002, 26(S1): 63-72.
XING Yong-Zhong, LIU Jian-Ye, GUO Wen-Jun, ZUO Wei and LI Xi-Guo. Role of Momentum Dependent Interaction on the Isospin Effects of Fragmentations and Dissipations at Intermediate Energy Heavy Ion Collisions[J]. Chinese Physics C, 2002, 26(S1): 63-72. shu
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Received: 1900-01-01
Revised: 1900-01-01
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Role of Momentum Dependent Interaction on the Isospin Effects of Fragmentations and Dissipations at Intermediate Energy Heavy Ion Collisions

    Corresponding author: XING Yong-Zhong,
  • Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China2 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China3 Department of Physics, Tianshui Normal College, Gansu Tianshui 741000, China
  • Received Date: 1900-01-01
  • Accepted Date: 1900-01-01
  • Available Online: 2002-06-24

Abstract: Based on an isospin-dependent quantum molecular dynamics model,the role of the momentum dependent interaction(MDI) on the isopspin effects of fragmentations and dissipations in the intermediate energy heavy ion collisions are studied.It was found that the values of the nuclear stopping,the number of nucleon emissions and the multiplicity of the intermediate mass fragments with MDI are larger than those without MDI. Especially the differences between those quantities with isospin dependent in-medium nucleon-nucleon cross section and those without the isospin independent in-medium nucleon-nucleon cross section (i.e., the isospin effect of in-medium nucleon-nucleon cross section) under MDI are also larger than those differences without MDI in the relative high energy region, which means that the momentum dependent interaction enhances the sensitivities of those quantities to the isospin effect of in-medium nucleon-nucleon cross section at the relative high beam energies.

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