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Observations of the Li, Be, and B isotopes and constraints on cosmic-ray propagation | | G. A. de Nolfo
; I. V. Moskalenko
; W. R. Binns
; E.R. Christian
; A. C. Cummings
; A. J. Davis
; J. S. George
; P. L. Hink
; M. H. Israel
; R. A. Leske
; M. Lijowski
; R. A. Mewaldt
; E. C. Stone
; A. W. Strong
; T. T. von Rosenvinge
; M. E. Wiedenbeck
; N. E. Yanasak
; | | Date: |
9 Nov 2006 | | Abstract: | The abundance of Li, Be, and B isotopes in galactic cosmic rays (GCR) between E=50-200 MeV/nucleon has been observed by the Cosmic Ray Isotope Spectrometer (CRIS) on NASA’s ACE mission since 1997 with high statistical accuracy. Precise observations of Li, Be, B can be used to constrain GCR propagation models. iffalse Precise observations of Li, Be, and B in addition to well-measured production cross-sections are used to further constrain GCR propagation models. fi We find that a diffusive reacceleration model with parameters that best match CRIS results (e.g. B/C, Li/C, etc) are also consistent with other GCR observations. A $sim$15--20% overproduction of Li and Be in the model predictions is attributed to uncertainties in the production cross-section data. The latter becomes a significant limitation to the study of rare GCR species that are generated predominantly via spallation. | | Source: | arXiv, astro-ph/0611301 | | Services: | Forum | Review | PDF | Favorites | |
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