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
Published: 01 October 2012

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, Li Jun-Sheng, Li Hui-Ling 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, Cheng Jin-Xia, Cheng Bin, Wang Fang, Wang Qi, Zhang Hai-Qing, Xu Rong, Jia Hui-Ming, Li Xue-Qin. Chin. Phys. B, 2009, 18(2): 531-536.
[3]	Disappearance of isospin effect in projectile fragmentation at intermediate energy Ma Chun-Wang, Wei Hui-Ling, Wang Jun-Yang, Liu Gao-Jie. 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, Li Xue-Qin, Jia Hui-Ming, He Chun-Le, Liu Fang, Zhao Hui-Hua, Li Zhen-Yu, Li Jun-Sheng. Chin. Phys. B, 2007, 16(9): 2683-2688.
[5]	Intermittency in 3.7 A GeV ¹⁶O-emulsion interactions Zhang Dong-Hai, Zhao Hui-Hua, Liu Fang, He Chun-Le, Jia Hui-Ming, Li Xue-Qin, Li Zhen-Yu, Li Jun-Sheng. 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, Zhao Hui-Hua, Liu Fang, He Chun-Le, Jia Hui-Ming, Li Xue-Qin, Li Zhen-Yu, Li Jun-Sheng. Chin. Phys. B, 2006, 15(9): 1987-1995.
[7]	Isoscaling of projectile-like fragments Zhong Chen, Ma Yu-Gang, Fang De-Qing, Cai Xiang-Zhou, Chen Jin-Gen, Shen Wen-Qing, Tian Wen-Dong, Wang Kun, Wei Yi-Bin, Chen Jin-Hui, Guo Wei, Ma Chun-Wang, Ma Guo-Liang, Su Qian-Min, Yan Ting-Zhi, Zu. Chin. Phys. B, 2006, 15(7): 1481-1485.
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[10]	Fragmentation of ¹⁶O nuclei in nuclear emulsion Zhang Dong-Hai. Chin. Phys. B, 2002, 11(12): 1254-1258.

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