Investigation on the energy loss in low energy protons interacting with hydrogen plasma

doi:10.7498/aps.64.145202

	Investigation on the energy loss in low energy protons interacting with hydrogen plasma
	Golubev, A.3; Hoffmann, D. H. H.1; Deng Jia-Chuan 2,4; Zhao Yong-Tao4 ; Cheng Rui4 ; Zhou Xian-Ming4 ; Peng Hai-Bo 4; Wang Yu-Yu4 ; Liu Shi-Dong 2,4; Lei Yu4
刊名	ACTA PHYSICA SINICA
	2015-07-20
卷号	64 页码:6
关键词	proton plasma target energy loss coulomb logarithm
ISSN号	1000-3290
DOI	10.7498/aps.64.145202
英文摘要	Energy loss of protons with energy 100 keV penetrating the partially ionized hydrogen plasma target was measured. The plasma target was created by electric discharge in the hydrogen gas, the state of the plasma target was diagnosed by using the laser interferometry method: the free electron density is up to 10(16) cm(-3), temperature is about 1-2 eV, and the plasma target may exist at the microsecond level. It is found that the energy loss of protons is closely related to the free electron density, and the energy loss data enable us to infer the value of the Coulomb logarithm (10.8) for the stopping power of the free electrons. This agrees well with the theoretical prediction which is 4.3 times higher than that given by the Bethe formula for neutral hydrogen, which is a little bigger than Hoffmann's result but much smaller than Jacoby's result. Comparing our result with Hoffmann's, the energy we used is only 100 keV, much lower than 1.4 MeV/u, and the low-energy regime we applied could be the cause of the increase in the enhancement factor. However, in the comparison between our result and the Jacoby's, the effective charge for protons is almost constant, unlike the Kr+ impact in wihch the enhanced ion charge state induces the giant enhancement factor. Compared to the gas target, the energy loss enhancement factor in plasma target is 2.9.
资助项目	National Natural Science Foundation of China[11275241] ; National Natural Science Foundation of China[11105192] ; National Natural Science Foundation of China[11075192] ; National Natural Science Foundation of China[11275238] ; National Natural Science Foundation of China[11205225] ; National Natural Science Foundation of China[11075125]
WOS关键词	HEAVY-IONS ; TARGET ; MATTER ; DENSE
WOS研究方向	Physics
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000362976400029
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.impcas.ac.cn/handle/113462/23351]
专题	近代物理研究所_实验物理中心近代物理研究所_兰州重离子研究装置
通讯作者	Zhao Yong-Tao
作者单位	1.Tech Univ Darmstad, Inst Kernphys, D-64289 Darmstadt, Germany 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Inst Theoret & Expt Phys, Moscow 117259, Russia 4.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Golubev, A.,Hoffmann, D. H. H.,Deng Jia-Chuan,et al. Investigation on the energy loss in low energy protons interacting with hydrogen plasma[J]. ACTA PHYSICA SINICA,2015,64:6.
APA	Golubev, A..,Hoffmann, D. H. H..,Deng Jia-Chuan.,Zhao Yong-Tao.,Cheng Rui.,...&Savin, S..(2015).Investigation on the energy loss in low energy protons interacting with hydrogen plasma.ACTA PHYSICA SINICA,64,6.
MLA	Golubev, A.,et al."Investigation on the energy loss in low energy protons interacting with hydrogen plasma".ACTA PHYSICA SINICA 64(2015):6.