Untersuchungen über die schweren Kerne in der primären kosmischen Strahlung
Open Access
- 1 October 1958
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung A
- Vol. 13 (10) , 801-808
- https://doi.org/10.1515/zna-1958-1001
Abstract
Fragmentation probabilities and interaction mean free paths for the interaction of heavy nuclei (Z > 2) of the primary cosmic radiation with target nuclei of emulsions (Ilford G 5) have been obtained. The experiment has been carried out in Northern Italy, at a geomagnetic latitude of 46° N. The values are in good agreement with those reported previously by Fowler, Hillier, Waddington and Rajopadhye, Waddingto and Cester, Debenedetti, Garelli, Quassiati, Tallone, Vigone. Values are derived for the fragmentation probabilities in air by a geometrical model introduced by Noon and Kaplon. Assigning both to the incident particle and to the target nuclei a radius R = R0 · A⅓ , one obtains an effective nuclear radius R0=1,2·10-13 cm. Using our values for the fragmentation probabilities instead of the lower values found in an experiment by KAPLON et al., their ratio for the fluxes of L-nuclei to M-nuclei at the top of the atmosphere is increased from 0.46 to about 0.80.Keywords
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