CRIS measurements of electron-capture decay isotopes: 37Ar, 44Ti, 49V, 51Cr, 55Fe, and 57Co

Details CRIS measurements of electron-capture decay isotopes: 37Ar, 44Ti, 49V, 51Cr, 55Fe, and 57Co CRIS measurements of electron-capture decay isotopes: 37Ar, 44Ti, 49V, 51Cr, 55Fe, and 57Co

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....5.1675n&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

2

Scientific paper

The secondary isotopes 37 Ar, 44 Ti, 49 V, 51 Cr, 55 Fe, and 57 Co decay only by electron capture, which occurs preferentially at the lower cosmic-ray energies, where electron attachment is more likely. Measurements of the abundances of these isotopes may reveal the interstellar energies of cosmic rays during propagation and whether reacceleration occurred. Stable secondary isotopes may also be used to examine energy dependence and reacceleration. The Cosmic Ray Isotope Spectrometer has detected large numbers of these nuclei at 100 - 500 MeV/nucleon during a time spanning solar minimum and solar maximum, allowing an additional study of solar modulation. This paper will discuss several subiron abundance ratios and the implications for reacceleration and solar modulation.

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