Measurement of 3He/4He ratio in cosmic rays with the AMS experiment -: art. no. 048

被引：0
|
作者：
Xiong, ZH [1 ]
Chen, HS
Yang, CG
Yang, M
Chen, GM
Chen, G
Lü, YS
Zhuang, HL
Tang, XW
机构：
[1] Acad Sinica, Inst High Energy Phys, Beijing 100039, Peoples R China
[2] Hiroshima Univ, Grad Sch Sci, Hiroshima 7398526, Japan
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2003年 / 11期
关键词：
gamma and cosmic rays;
D O I：
暂无
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
The cosmic-ray He-3/He-4 ratios from 0.09 to 1.2 GeV per nucleon are measured by Alpha Magnetic Spectrometer (AMS) at its precursor mission on board the space shuttle Discovery during the flight STS-91 in June 1998. Taking unique advantage of AXIS data collected from a large region covering the earth equator, we also studied the magnetic latitude effect on the ratios. Our analysis shows that the relative abundances of He-3 and He-4 in cosmic rays depend weakly on the magnetic latitude, and given present uncertainties, the observed isotopic composition is generally consistent with the predictions of the standard propagation model of cosmic rays.
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页数：15
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