Abundances of 'secondary' elements among the ultraheavy cosmic rays -results from HEAO-3.
Abstract
The HEAO-3 Heavy Nuclei Experiment has measured elemental abundances of ultraheavy cosmic rays near earth. The elements with atomic number (Z) in the intervals Z = 44-48 and Z = 62-74 arriving at earth are expected to have significant secondary components. However, their source abundances are unlikely to be low enough to warrant treating them as pure secondaries. The present results are consistent with solar system abundances modified for first ionization potential with possibly some enhancement of the r to s ratio.
- Publication:
-
International Cosmic Ray Conference
- Pub Date:
- August 1983
- Bibcode:
- 1983ICRC....9..279K
- Keywords:
-
- Abundance;
- Heao 3;
- Heavy Nuclei;
- Secondary Cosmic Rays;
- Cosmochemistry;
- Solar System;
- Spaceborne Experiments;
- Space Radiation;
- Cosmic Rays:Element Abundances