利用同位旋相关的量子分子动力学（IQMD）模型,分析了中能重离子碰撞过程中相对论平均场和Skyrme Hartrere-Fork等核结构模型给出的核密度分布对原子核阻止的影响。研究表明,从费米能到100MeV/u的较大能量范围内,无论小质量体系还是大质量体系,原子核阻止对同位旋相关的核子-核子碰撞截面都非常灵敏,而不同模型给出的核密度分布对原子核阻止影响不大。这说明原子核阻止作为提取同位旋相关核子-核子碰撞截面的灵敏探针是与原子核结构模型无关的。
Influence of density distribution which is given by RMF and Skyrme-Hartrere-Fork et al. nuclear structure model on nuclear stopping in heavy-ion collisions at intermediate energies is studied hy using isospin-dependent quantum molecular dynamics （IQMD） model. Research shows that in the range from the Fermi energy to the energy of 100 MeV/u, for both small and large mass system, nuclear stopping is found to be strongly dependent on the nucleon-nucleon cross sections, and weakly on different density distribution . This shows that nuclear stopping can be used as a probe to extract the information on the isospin dependence N-N cross sections and has no relationship with nuclear structure models.
参考文献
| [1] | LI B A,KO C M,BAUER W.Int J Mod Phys,1998,E7:147. |
| [2] | PARK R,BENENSON W,BJARK O,et al.Phys Rev Lett,1997,78:1022. |
| [3] | XU H.Phys Rev Lett,2000,85:716. |
| [4] | TSANG M B.Phys Rev Lett,2001,86:5023. |
| [5] | LI Bao’an.Phys Rev,2001,C64:054604. |
| [6] | LI Bao’an,KO Cheming,REN Zhongzhou,et al.Phys Rev Lett,1997,78:1644. |
| [7] | PARK R.Phys Rev Lett,1997,78:1026. |
| [8] | COLONNA M,DI T M.Phys Rev,1998,C57:1410. |
| [9] | DI T M.Nucl Phys,2001,A681:426C. |
| [10] | XIAO Zhigang,LI Bao’an,CHEN Liewen,et al.Phys Rev Lett,2009,102:062502. |
| [11] | WEN Dehua,LI Bao’an,CHEN Liewen.Phys Rev Lett,2009,103:211102. |
| [12] | LIU Jianye,GUO Wenjun,XING Yongzhong.Nucl Phys,2003,A726:123. |
| [13] | LIU Jianye,GUO Wenjun,WANG Shunjin,et al.Phys Rev Lett,2001,86(6):975. |
| [14] | LIU Jianye,GUO Wenjun,XING Yongzhong,et al.Phys Lett,2002,B540:213. |
| [15] | BAUER W.Phys Rev Lett,1988,61:2534. |
| [16] | BUSZA W,LEDOUX R J.Annu Rev Nucl Part Sci,1988,38:119. |
| [17] | LI Bao’an,WONG C Y.Phys Scr,1993,V47:151. |
| [18] | BERTSCH G F,BROWN G E,KOCH V,et al.Nucl Phys,1988,A490:745. |
| [19] | PEILERT G,ROSENHAUER A,AICHELIN J,et al.Phys Rev,1989,C39:1402. |
| [20] | HARTNACK C,PURI RAJEEV K,AICHELIN J,et al.Eur Phys J,1998,A1:151. |
| [21] | CHEN Liewen,ZHANG Fengshou,JIN Genming.Phys Rev,1998,C58:2283. |
| [22] | ALKAHZOV G.Nucl Phys,1977,A280:365. |
| [23] | KLAKOW D,WELKE G,BAUER W.Phys Rev,1993,C48:1982. |
| [24] | CHEN K,FRAENKEL Z,FRIEDLANDER G,et al.Phys Rev,1968,166:949. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%