| タイトル | Cosmic-ray propagation in the Galaxy and in the heliosphere - The path-length distribution at low energy |
| 著者（英） | Margolis, S. H.; Garcia-Munoz, M.; Guzik, T. G.; Simpson, J. A.; Wefel, J. P. |
| 著者所属（英） | Chicago Univ.|Washington Univ.|Louisiana State Univ. |
| 発行日 | 1987-05-01 |
| 言語 | eng |
| 内容記述 | The energy dependence of the path-length distribution of cosmic rays at low energies, below relativistic velocities, is studied, and its implications for models of cosmic-ray confinement and propagation in the Galaxy and Galactic halo, including the effects of a possible Galactic wind, are studied. It is found that the mean free path in Galactic propagation must be fully energy-dependent, with the mean of an exponential path-length distribution increasing with increasing energy below 1 GeV per nucleon and decreasing with increasing energy above 1 GeV per nucleon. This indicates that, at low energies, diffusion is not the controlling process. The path-length distribution is not purely exponential but is depleted in short path lengths at low energies. This depletion is energy-dependent, being largest at low energies and decreasing with increasing energy. |
| NASA分類 | SPACE RADIATION |
| レポートNO | 87A40486 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/377637 |
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