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.
Received: 27 October 2003
Revised: 25 April 2004
Accepted manuscript online:
PACS:
25.75.-q
(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))
Fund: 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.
Cite this article:
Zhang Dong-Hai (张东海), Li Zhen-Yu (李振宇), Li Jun-Sheng (李俊生), Wu Feng-Juan (吴凤娟) Production of helium projectile fragments in 16O－emulsion interactions at 4.5 A GeV/c 2004 Chinese Physics 13 1239
Intermittency in 3.7 A GeV 16O-emulsion interactions Zhang Dong-Hai(张东海), Zhao Hui-Hua(赵惠华), Liu Fang(刘芳), He Chun-Le(何春乐), 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). Chin. Phys. B, 2007, 16(9): 2689-2700.
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