Matter traversed by low-energy cosmic-ray nuclei in space

Biswas, S. ; Ramadurai, S. ; Sreenivasan, N. (1966) Matter traversed by low-energy cosmic-ray nuclei in space Physical Review Letters, 149 (4). pp. 1037-1040. ISSN 0031-9007

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The amount of matter traversed in space by the primary cosmic-ray nuclei of energy 50-150, 200-500, 500-1000, and >1500 MeV/nucleon are obtained as 5.5±1.4, 9.1±0.9, 5.3±0.5, and 3.1± 0.4 g cm-2 of hydrogen, respectively, using recent measurements of spallation cross sections with proton beams from accelerators and Li/M ratios of cosmic-ray nuclei (where M denotes nuclei with 6<~Z<~9). These results and other evidence seem to suggest the hypothesis of two distinct sources (or propagation paths) of cosmicray nuclei, one responsible for nuclei of energy roughly 50-150 MeV/nucleon and the other of energies greater than this.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:3803
Deposited On:18 Oct 2010 09:44
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