中国物理B ›› 2004, Vol. 13 ›› Issue (8): 1239-1245.doi: 10.1088/1009-1963/13/8/010

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Production of helium projectile fragments in {16O－emulsion interactions at 4.5 A GeV/c

张东海, 李振宇, 李俊生, 吴凤娟   

  1. Institute of Modern Physics, Shanxi Teachers' University, Linfen 041004, China
  • 收稿日期:2003-10-27 修回日期:2004-04-25 出版日期:2004-06-21 发布日期:2005-06-21
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10275042), the Shanxi Provincial Natural Science Foundation (Grant No.20021007) and Shanxi Provincial Foundation for Returned Scholars of China.

Production of helium projectile fragments in 16O－emulsion interactions at 4.5 A GeV/c

Zhang Dong-Hai (张东海), Li Zhen-Yu (李振宇), Li Jun-Sheng (李俊生), Wu Feng-Juan (吴凤娟)   

  1. Institute of Modern Physics, Shanxi Teachers' University, Linfen 041004, China
  • Received:2003-10-27 Revised:2004-04-25 Online:2004-06-21 Published:2005-06-21
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10275042), the Shanxi Provincial Natural Science Foundation (Grant No.20021007) and Shanxi Provincial Foundation for Returned Scholars of China.

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摘要： The measurements of partial production cross sections of the multiple helium projectile fragments emitted at 4.5 A GeV/c {}^{16}O－Em interactions are reported. We have studied the production rate of helium projectile fragments due to fragmentation of {}^{16}O ions and compared it with that obtained from different projectiles at various energies. The dependence of on the mass number of the incident beams is formulated. The multiplicity distributions of the helium fragments produced in {}^{16}O－Em interactions at different energies exhibit Koba－Nielson－Olesen (KNO) scaling. The correlation of helium projectile fragments and target fragments is also investigated and it is found that the average of target fragments is increased with the decrease of the number of helium fragments in peripheral interactions.

关键词: relativistic heavy-ion collision, helium projectile fragments, KNO scaling, production cross-section, multiplicity correlation

Abstract: The measurements of partial production cross sections of the multiple helium projectile fragments emitted at 4.5 A GeV/c $^{16}$O－Em interactions are reported. We have studied the production rate of helium projectile fragments due to fragmentation of $^{16}$O ions and compared it with that obtained from different projectiles at various energies. The dependence of $< n_{\alpha}>$  on the mass number of the incident beams is formulated. The multiplicity distributions of the helium fragments produced in $^{16}$O－Em interactions at different energies exhibit Koba－Nielson－Olesen (KNO) scaling. The correlation of helium projectile fragments and target fragments is also investigated and it is found that the average of target fragments is increased with the decrease of the number of helium fragments in peripheral interactions.

Key words: relativistic heavy-ion collision, helium projectile fragments, KNO scaling, production cross-section, multiplicity correlation

中图分类号:  (Relativistic heavy-ion collisions (collisions induced by light ions studied to calibrate relativistic heavy-ion collisions should be classified under both 25.75.-q and sections 13 or 25 appropriate to the light ions))

  • 25.75.-q
27.20.+n (6 ≤ A ≤ 19) 25.70.Pq (Multifragment emission and correlations) 25.70.Mn (Projectile and target fragmentation)