Single source emission of proton projectile fragments in nucleus-emulsion interactions

doi:10.1088/1674-1056/21/11/110501

Abstract The projected angular distribution and transverse momentum distribution of proton projectile fragments produced in 3.7A GeV ¹⁶O, 500A MeV ⁵⁶Fe, and 1.7A GeV ⁸⁴Kr induced different kinds of emulsion targets (H, CNO, and AgBr) interactions are investigated. It is found that the projected angular distribution and transverse momentum distribution can be well represented by a single Gaussian distribution. Comparison of transverse momentum distribution with the Maxwell-Boltzmann distribution reveals that proton projectile fragments are emitted from a single-temperature emission source. The temperature is different for different colliding systems, and linearly depends on the target size.

Keywords: nucleus-nucleus collision proton projectile fragments projectile fragmentation nuclear emulsion

Received: 29 March 2012
Revised: 26 May 2012
Accepted manuscript online:

PACS:	05.30.Rt	(Quantum phase transitions)
	52.25.Tx	(Emission, absorption, and scattering of particles)
	52.20.Hv	(Atomic, molecular, ion, and heavy-particle collisions)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11075100) and Shanxi Scholarship Council of China (Grant No. 2011-058).

Corresponding Authors: Zhang Dong-Hai
E-mail: zhangdh@dns.sxnu.edu.cn

Cite this article:

Zhang Dong-Hai (张东海), Li Jun-Sheng (李俊生), Li Hui-Ling (李惠玲 ) Single source emission of proton projectile fragments in nucleus-emulsion interactions 2012 Chin. Phys. B 21 110501

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[2]	Helium production from ⁸⁴Kr-- and ¹⁹⁷Au--emulsion interactions at high energies Zhang Dong-Hai(张东海), Cheng Jin-Xia(程锦霞), Cheng Bin(成宾), Wang Fang(王芳), Wang Qi(王琦), Zhang Hai-Qing(张海青), Xu Rong(许蓉), Jia Hui-Ming(贾会明), and Li Xue-Qin(李雪琴). Chin. Phys. B, 2009, 18(2): 531-536.
[3]	Disappearance of isospin effect in projectile fragmentation at intermediate energy Ma Chun-Wang(马春旺) Wei Hui-Ling(魏慧玲), Wang Jun-Yang(王俊阳), and Liu Gao-Jie(刘高杰). Chin. Phys. B, 2009, 18(11): 4781-4785.
[4]	Evidence of intermittent fluctuation of target fragments in ⁸⁴Kr--AgBr interactions at 1.7 A GeV Zhang Dong-Hai(张东海), Li Xue-Qin(李雪琴), Jia Hui-Ming(贾会明), He Chun-Le(何春乐), Liu Fang(刘芳), Zhao Hui-Hua(赵惠华), Li Zhen-Yu(李振宇), and Li Jun-Sheng(李俊生). Chin. Phys. B, 2007, 16(9): 2683-2688.
[5]	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.
[6]	Forward--backward multiplicity correlations in 4.5 A GeV/c 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, 2006, 15(9): 1987-1995.
[7]	Isoscaling of projectile-like fragments Zhong Chen (钟晨), Ma Yu-Gang (马余刚), Fang De-Qing (方德清), Cai Xiang-Zhou (蔡翔舟), Chen Jin-Gen (陈金根), Shen Wen-Qing (沈文庆), Tian Wen-Dong (田文栋), Wang Kun (王鲲), Wei Yi-Bin (魏义彬), Chen Jin-Hui (陈金辉), Guo Wei (郭威), Ma Chun-Wang (马春旺), Ma Guo-Liang (马国亮), Su Qian-Min (苏前敏), Yan Ting-Zhi (颜庭志), Zuo Jia-Xu (左嘉旭). Chin. Phys. B, 2006, 15(7): 1481-1485.
[8]	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). Chin. Phys. B, 2006, 15(11): 2564-2570.
[9]	Fragmentation in ¹⁶O-emulsion interactions at 3.7 A GeV Zhang Dong-Hai (张东海), Li Zhen-Yu (李振宇), Li Hui-Ling (李惠玲), Li Jun-Sheng (李俊生). Chin. Phys. B, 2005, 14(12): 2451-2457.
[10]	Fragmentation of ¹⁶O nuclei in nuclear emulsion Zhang Dong-Hai (张东海). Chin. Phys. B, 2002, 11(12): 1254-1258.

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