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在详细比较同位旋相关的核子-核子碰撞截面的几种常用形式的基础上,利用IBUU模型, 分别对具有相同质量的60Ca+60Ca和60Ni+60Ni的中能重离子碰撞进行了模拟计算,定量地分析了碰撞过程中不同形式的同位旋相关的核子-核子碰撞截面对于核子的快度分布和集体流的影响.结果显示: 不同形式的核子碰撞截面,可以给出相差较大的核子的快度分布和横向流, 但在同一种截面形式下,对称势的变化对横向流的影响较小.这表明在新的动量相关的对称势下, 中能重离子碰撞中集体流对于截面的敏感性依然成立;同时表明,在相同的碰撞截面和对称势形式下, 当入射能量在平衡能附近时,入射粒子的中质比对核子在平面流的影响较大,反之,影响较小.In this paper, the influences of the different forms of nucleon-nucleon (NN) cross sections on the rapidity distributions and the in-plane flows of nucleons in reactions 60Ca+60Ca and 60Ni+60Ni are studied by using IBUU04 transport model with the moment-dependent symmetry potential. The calculation results indicate that (1) the discrepancies of the rapidity distributions and in-plane flows corresponding to different forms of NN cross sections are large, (2) the sensitivity of the in-plane flow to the NN cross section still holds when the new form of moment-dependent symmetry energy is adopted, and (3) the influence of the N/P ratio of reaction systems on the transverse flow calculated with a certain NN cross section is more obvious when the incident energy is near the balance energy.
[1] Li B A 1993 Phys. Rev. C 48 2415
[2] Li Q F, Li Z X, Mao G J 2000 Phys. Rev. C 62 014606
[3] Li Q F, Li Z X, Zhao E G 2004 Phys. Rev. C 69 017601
[4] Westfall G D, Bauer W, Craig D, Cronqvist M 1993 Phys. Rev. Lett. 71 1986
[5] Xu H M 1991 Phys. Rev. Lett. 67 2769
[6] Xu H M 1992 Phys. Rev. C 46 R389
[7] Zhao Q, Chen B, Liu J Y, Zhang F S, Wang S J, Chen L W, Zuo W 2000 High Energy Physics And Nuclear Physics 24 426 (in Chinese) [赵强, 陈波, 刘建业, 张丰收, 王顺金, 陈列文, 左维 2000 高能物理与核物理 24 426]
[8] Liu J Y, Guo W J, Zuo W, Li X G 2008 Acta Phys. Sin. 57 5458 (in Chinese) [刘建业, 郭文军, 左维, 李希国 2008 物理学报 57 5458]
[9] Li B A, Das C B, Gupta S D 2004 Phys. Rev. C 69 011603
[10] Chen L W, Ko C M, Li B A 2004 Phys. Rev. C 69 054606
[11] Yong G C, Li B A, Chen L W, Zuo W 2006 Acta Phys. Sin. 55 5166 (in Chinese) [雍高产, 李宝安, 陈列文, 左维 2006 物理学报 55 5166]
[12] Liu J Y, Guo W J 2010 Acta Phys. Sin. 59 6933 (in Chinese) [刘建业, 郭文军 2010 物理学报 59 6933]
[13] Li B A, Chen L W, Ko C M 2008 Phys. Rep. 464 113
[14] Li B A, Ko C M, Baur W 1998 Int. J. Mod. Phys. E 7 147
[15] Chen K, Fraenkel Z, Friedlander G, Grover 1968 Phys. Rev. 166 949
[16] Chen L W, Zhang X D, Ge L X 1996 High Energy Physics and Nuclear Physic 20 1091 (in Chinese) [陈列文, 张晓东, 葛凌霄 1996 高能物理与核物理 20 1091]
[17] Klakow D, Welke G, Bauer W 1993 Phys. Rev. C 48 1982
[18] Zhang F S, Li W F, Jin G M 2001 Progress in Physics 21 469 (in Chinese) [张丰收, 李文飞, 靳根明 2001 物理学进展 21 469]
[19] Li G Q, Machleidt R 1993 Phys. Rev. C 48 1702
[20] Li G Q, Machleidt R 1994 Phys. Rev. C 49 566
[21] Cai X Z, Feng J, Shen W Q, Ma Y G 1998 High Energy Physics and Nuclear Physics 22 830 (in Chinese) [蔡翔舟, 冯军, 沈文庆, 马余刚 1998 高能物理与核物理 22 830]
[22] Cai X Z, Shen W Q 2001 Progress in Physics 21 278 (in Chinese) [蔡翔舟, 沈文庆 2001 物理学进展 21 278]
[23] Li B A, Das C B, Gupta S D, Gale C 2004 Phys. Rev. C 69 011603
[24] Das C B, Gupta S D, Gale C, Li B A 2003 Phys.Rev. C 67 034611
[25] Yong G C, Chen L W, Li B A, Zuo W 2006 High Energy Physics and Nuclear Physics 30 642 (in Chinese) [雍高产, 陈列文, 李宝安, 左维 2006 高能物理与核物理 30 642]
[26] Chen L W, Zhang F S, Zeng X H, Jin G M 1998 High Energy Physics and Nuclear Physics 22 1035 (in Chinese) [陈列文, 张丰收, 曾祥华, 勒根明 1998 高能物理与核物理 22 1035]
[27] Li B A, Ren Z Z, Ko C M, Yennello S J 1996 Phys. Rev. Lett. 76 4492
[28] Liu J Y, Guo W J, Wang S J 2001 Phys. Rev. Lett. 86 975
[29] Kumar S, Kumar S 2010 Phys. Rev. C 81 014601
[30] Chen J Y 2006 Ph. D. Dissertation (Lanzhou: Lanzhou University) (in Chinese) [陈继延 2006 博士学位论文(兰州:兰州大学)]
[31] Kumar S, Chugh R 2010 arXiv: 1009. 5464 v1 [Nucl-th]
[32] Zhang Y X, Li Z X, Danielewicz P 2007 Phys. Rev. C 75 034615
[33] Kumar S, Rajni J, Kumar S 2010 arXiv: 1009. 5470 vl [Nucl-th]
[34] Sood A D, Puri R K 2004 Phys. Rev. C 69 054612
[35] Sood A D, Puri R K, Aichelin J 2004 Phys. Lett. B 594 260
[36] Sood A D, Puri R K 2009 Phys. Rev. C 79 064618
[37] Chen L W, Zhang F S, Jin G M 1998 Phys. Rev. C 58 2283
[38] Li Q F, Li Z X, Soff S 2006 J. Phys. G: Nucl. Part. Phys. 32 407
[39] Li B A, Danielewicz P, Lynchl W G 2005 Phys. Rev. C 71 054603
[40] Gautam S 2011 arXiv: 1105. 0526 vl [Nucl-th]
[41] Pak R, Li B A, Benenson W 1997 Phys. Rev. Lett. 78 1026
[42] Pak R, Benenson W, Bjarki O 1997 Phys. Rev. Lett. 78 1022
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[1] Li B A 1993 Phys. Rev. C 48 2415
[2] Li Q F, Li Z X, Mao G J 2000 Phys. Rev. C 62 014606
[3] Li Q F, Li Z X, Zhao E G 2004 Phys. Rev. C 69 017601
[4] Westfall G D, Bauer W, Craig D, Cronqvist M 1993 Phys. Rev. Lett. 71 1986
[5] Xu H M 1991 Phys. Rev. Lett. 67 2769
[6] Xu H M 1992 Phys. Rev. C 46 R389
[7] Zhao Q, Chen B, Liu J Y, Zhang F S, Wang S J, Chen L W, Zuo W 2000 High Energy Physics And Nuclear Physics 24 426 (in Chinese) [赵强, 陈波, 刘建业, 张丰收, 王顺金, 陈列文, 左维 2000 高能物理与核物理 24 426]
[8] Liu J Y, Guo W J, Zuo W, Li X G 2008 Acta Phys. Sin. 57 5458 (in Chinese) [刘建业, 郭文军, 左维, 李希国 2008 物理学报 57 5458]
[9] Li B A, Das C B, Gupta S D 2004 Phys. Rev. C 69 011603
[10] Chen L W, Ko C M, Li B A 2004 Phys. Rev. C 69 054606
[11] Yong G C, Li B A, Chen L W, Zuo W 2006 Acta Phys. Sin. 55 5166 (in Chinese) [雍高产, 李宝安, 陈列文, 左维 2006 物理学报 55 5166]
[12] Liu J Y, Guo W J 2010 Acta Phys. Sin. 59 6933 (in Chinese) [刘建业, 郭文军 2010 物理学报 59 6933]
[13] Li B A, Chen L W, Ko C M 2008 Phys. Rep. 464 113
[14] Li B A, Ko C M, Baur W 1998 Int. J. Mod. Phys. E 7 147
[15] Chen K, Fraenkel Z, Friedlander G, Grover 1968 Phys. Rev. 166 949
[16] Chen L W, Zhang X D, Ge L X 1996 High Energy Physics and Nuclear Physic 20 1091 (in Chinese) [陈列文, 张晓东, 葛凌霄 1996 高能物理与核物理 20 1091]
[17] Klakow D, Welke G, Bauer W 1993 Phys. Rev. C 48 1982
[18] Zhang F S, Li W F, Jin G M 2001 Progress in Physics 21 469 (in Chinese) [张丰收, 李文飞, 靳根明 2001 物理学进展 21 469]
[19] Li G Q, Machleidt R 1993 Phys. Rev. C 48 1702
[20] Li G Q, Machleidt R 1994 Phys. Rev. C 49 566
[21] Cai X Z, Feng J, Shen W Q, Ma Y G 1998 High Energy Physics and Nuclear Physics 22 830 (in Chinese) [蔡翔舟, 冯军, 沈文庆, 马余刚 1998 高能物理与核物理 22 830]
[22] Cai X Z, Shen W Q 2001 Progress in Physics 21 278 (in Chinese) [蔡翔舟, 沈文庆 2001 物理学进展 21 278]
[23] Li B A, Das C B, Gupta S D, Gale C 2004 Phys. Rev. C 69 011603
[24] Das C B, Gupta S D, Gale C, Li B A 2003 Phys.Rev. C 67 034611
[25] Yong G C, Chen L W, Li B A, Zuo W 2006 High Energy Physics and Nuclear Physics 30 642 (in Chinese) [雍高产, 陈列文, 李宝安, 左维 2006 高能物理与核物理 30 642]
[26] Chen L W, Zhang F S, Zeng X H, Jin G M 1998 High Energy Physics and Nuclear Physics 22 1035 (in Chinese) [陈列文, 张丰收, 曾祥华, 勒根明 1998 高能物理与核物理 22 1035]
[27] Li B A, Ren Z Z, Ko C M, Yennello S J 1996 Phys. Rev. Lett. 76 4492
[28] Liu J Y, Guo W J, Wang S J 2001 Phys. Rev. Lett. 86 975
[29] Kumar S, Kumar S 2010 Phys. Rev. C 81 014601
[30] Chen J Y 2006 Ph. D. Dissertation (Lanzhou: Lanzhou University) (in Chinese) [陈继延 2006 博士学位论文(兰州:兰州大学)]
[31] Kumar S, Chugh R 2010 arXiv: 1009. 5464 v1 [Nucl-th]
[32] Zhang Y X, Li Z X, Danielewicz P 2007 Phys. Rev. C 75 034615
[33] Kumar S, Rajni J, Kumar S 2010 arXiv: 1009. 5470 vl [Nucl-th]
[34] Sood A D, Puri R K 2004 Phys. Rev. C 69 054612
[35] Sood A D, Puri R K, Aichelin J 2004 Phys. Lett. B 594 260
[36] Sood A D, Puri R K 2009 Phys. Rev. C 79 064618
[37] Chen L W, Zhang F S, Jin G M 1998 Phys. Rev. C 58 2283
[38] Li Q F, Li Z X, Soff S 2006 J. Phys. G: Nucl. Part. Phys. 32 407
[39] Li B A, Danielewicz P, Lynchl W G 2005 Phys. Rev. C 71 054603
[40] Gautam S 2011 arXiv: 1105. 0526 vl [Nucl-th]
[41] Pak R, Li B A, Benenson W 1997 Phys. Rev. Lett. 78 1026
[42] Pak R, Benenson W, Bjarki O 1997 Phys. Rev. Lett. 78 1022
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