On the Low Energy Decrease in Galactic Cosmic Ray Secondary/Primary Ratios

Davis, A. J.
Mewaldt, R. A.
Binns, W. R.
Christian, E. R.
Cummings, A. C.
George, J. S.
Hink, P. L.
Leske, R. A.
von Rosenvinge, T. T.
Wiedenbeck, M. E.
Yanasak, N. E.

Publication date

September 2000

Publisher

AIP Publishing

Abstract

Galactic cosmic ray (GCR) secondary/primary ratios such as B/C and (Sc+Ti+V)/Fe are commonly used to determine the mean amount of interstellar material through which cosmic rays travel before escaping from the Galaxy (Λesc). These ratios are observed to be energy-dependent, with a relative maximum at ∼1 GeV/nucleon, implying a corresponding peak in Λesc. The decrease in Λ_(esc) at energies above 1 GeV/nucleon is commonly taken to indicate that higher energy cosmic rays escape more easily from the Galaxy. The decrease in Λ_(esc) at energies <1 GeV/nuc is more controversial; suggested possibilities include the effects of a galactic wind or the effects of distributed acceleration of cosmic rays as they pass through the interstellar medium. We ...

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On the Low Energy Decrease in Galactic Cosmic Ray Secondary/Primary Ratios

Abstract

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On the Low Energy Decrease in Galactic Cosmic Ray Secondary/Primary Ratios

Abstract

Extracted data

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