中国物理B ›› 2006, Vol. 15 ›› Issue (11): 2564-2570.doi: 10.1088/1009-1963/15/11/018

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Features of the total disintegration events of heavyemulsion targets caused by 4.5A GeV/c16O

张东海, 刘芳, 何春乐, 赵惠华, 贾会明, 李雪琴, 李振宇, 李俊生   

  1. Institute of Modern Physics, Shanxi Normal University, Linfen 041004, China
  • 收稿日期:2005-12-07 修回日期:2006-06-20 出版日期:2006-11-20 发布日期:2006-11-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10475054), the Major Science and Technology Foundation of Ministry of Education of China (Grant No 205026), the Natural Science Foundation of Shanxi Province, China (Grant No 20021007) and Shanxi Provincial Foundation for Returned Scholars, China (Grant No 20031046)

Features of the total disintegration events of heavyemulsion targets caused by 4.5A GeV/c16O

Zhang Dong-Hai(张东海), Liu Fang(刘芳), He Chun-Le(何春乐), Zhao Hui-Hua(赵惠华), Jia Hui-Ming(贾会明), Li Xue-Qin(李雪琴), Li Zhen-Yu(李振宇), and Li Jun-Sheng(李俊生)   

  1. Institute of Modern Physics, Shanxi Normal University, Linfen 041004, China
  • Received:2005-12-07 Revised:2006-06-20 Online:2006-11-20 Published:2006-11-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10475054), the Major Science and Technology Foundation of Ministry of Education of China (Grant No 205026), the Natural Science Foundation of Shanxi Province, China (Grant No 20021007) and Shanxi Provincial Foundation for Returned Scholars, China (Grant No 20031046)

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摘要： Total disintegration events produced by 4.5\,A GeV/c $^{16}$O--AgBr interactions are analysed to investigate the characteristics of secondary charged particles produced in such collisions. The multiplicity distributions of grey, black, and relativistic charged particles can be well represented by Gaussian distribution. The average multiplicity of grey particles is found to increase with the mass of projectile increasing, while that of black particles is found to decrease with the mass of projectile increasing. This result is in good agreement with the prediction of fireball model. Finally, the linear dependence between grey and black particles is observed, but there is no distinct dependence between the production of relativistic charged particles and the target excitation.

关键词: relativistic heavy-ion collision, total disintegration, nuclear emulsion

Abstract: Total disintegration events produced by 4.5 A GeV/c $^{16}$O--AgBr interactions are analysed to investigate the characteristics of secondary charged particles produced in such collisions. The multiplicity distributions of grey, black, and relativistic charged particles can be well represented by Gaussian distribution. The average multiplicity of grey particles is found to increase with the mass of projectile increasing, while that of black particles is found to decrease with the mass of projectile increasing. This result is in good agreement with the prediction of fireball model. Finally, the linear dependence between grey and black particles is observed, but there is no distinct dependence between the production of relativistic charged particles and the target excitation.

Key words: relativistic heavy-ion collision, total disintegration, nuclear emulsion

中图分类号:  (Particle and resonance production)

  • 25.75.Dw
21.65.-f (Nuclear matter) 24.10.Pa (Thermal and statistical models) 27.20.+n (6 ≤ A ≤ 19)