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核子-核子碰撞截面对同位素标度参数α的介质效应 被引量:2

Medium effect of nucleon-nucleon cross section on the isoscaling parameter α
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摘要 核子能量在40—60MeV能区范围,对在两对重离子中心碰撞系统40Ca+48Ca和60Ca+48Ca以及112Sn+112Sn和124Sn+124Sn的反应中就同位素标度参数α对于核子-核子碰撞截面σmNeNd(αm)的介质效应进行了研究.结果发现,核子-核子碰撞介质效应对同位素标度参数α具有明显的影响.就产生这种介质效应的机理进行了分析和讨论. The medium effect of nucleon-nucleon cross section σNN^med ( α ) on the isoscaling parameter a is investigated for two couples of central nuclear center reactions ^40Ca +^ 48 Ca and^ 60 Ca + 48 Ca, ^112 Sn + ^112 Sn and^ 124 Sn +^ 124 Sn with isospin dependent quantum molecular dynamics at beam nucleon energies from 40 to 60 MeV. It is found that there is very obvious medium effects of nucleon-nucleon cross section σNN^med (α) on the isoscaling parameters a. The mechanism of the above properties is also studied and discussed.
出处 《物理学报》 SCIE EI CAS CSCD 北大核心 2008年第4期2136-2140,共5页 Acta Physica Sinica
基金 国家重点基础研究发展规划(批准号:G2000077400) 国家自然科学基金重点项目(批准号:10435080) 国家自然科学基金(批准号:10447006,10575075) 中国科学院知识创新工程重要方向性项目(批准号:KJCX2-SW-N02)资助的课题~~
关键词 同位素标度行为 介质效应 核子-核子碰撞截面 重离子碰撞 isoscaling, medium effect, nucleon-nucleon cross section, heavy ion collision
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参考文献21

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同被引文献27

  • 1Xu H S, Tsang M B, Liu T X, Liu X D, Lynch W G, Tan W P, Vander Molen A, Verde G, Wagner A, Xi H F, Gelbke C K Beaulieu L, Davin B, Larochelle Y, Lefort T, de Souza R T, Yanez R, Viola V E, Charity R J, Sobotka L G 2000 Phys. Rev. Lett. 85 716.
  • 2Tsang M B, Friedman . W A, Gelbke C K, Lynch W G, Verde G, Xu H S 2001 Phys. Rev. Lett. 86 5023.
  • 3Tsang M B, Gelbke C K, Liu X D, Lynch W G, Tan W P, Verde G, Xu H S 2001 Phys. Rev .C 64 054615.
  • 4Ma Y G, Wang K, Cai X Z, Chen J G, Chen J H, Fang D Q,Guo W, MaCW, MaGL, ShenWQ, SuQW, TianWD, WeiYB, Yon T Z, Zhong C, Zhou X F, Zuo T X 2005 Phys. Rev. C 72 064603.
  • 5Dorso C O, Escudero C R,Ison M, Lopez J A 2006 Phys. Rev. C 73 044601.
  • 6Souliotis G A, Shetty D V, Eeselsky M V, Chubarian G, Trache L, Keksis A, Martin E, Yennello S J 2003 Phys. Rev. C 68 024605.
  • 7Souliotis G A, Shetty D V, Kekis A, Bell E, Jandel M, Veselsky M, Yennello S T 2006 Phys. Rev. C73 024606.
  • 8Veselsky M, Souliotis G A, Jandel M 2004 Phys. Rev. C 69 044607.
  • 9Machner H,Aschman D G, Baruth-Ram K, Carter T, Cowley A A Goldenbaum F, Nangu B M, Pilcher T V, Sideras-Haddad E Sellschop T P F, Smit F D, Spoelstra B, Steyn D 2006 Phys. Rev C 73 044606.
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