Measurements of ultraheavy cosmic rays with HEAO-3.
Abstract
The HEAO-3 Heavy Nuclei Experiment has measured abundances of elements from Ar-18 to U-92 in the cosmic rays. The results on the ultraheavy elements, those with atomic numbers greater than 30, indicate that the source of the cosmic rays contain a mixture of r-process and s-process material similar to that found in the solar system. This result is at variance with previous indications that the sources are greatly enhanced with freshly synthesized r-process material. Apparent discrepancies between the results and the accepted solar-system abundance have led to a reexamination of data on photospheric abundances of Ge and Pb, resulting in suggested reductions in their values.
- Publication:
-
NASA Conference Publication
- Pub Date:
- June 1987
- Bibcode:
- 1987NASCP2464..173B
- Keywords:
-
- Abundance;
- Cosmic Rays;
- Heavy Nuclei;
- Solar System;
- Cerenkov Counters;
- Energy Spectra;
- Germanium;
- Heao 3;
- Lead (Metal);
- Scintillation Counters;
- Space Radiation;
- Cosmic Rays:Element Abundances;
- Cosmic Rays:Heavy Elements;
- Cosmic Rays:Nucleosynthesis;
- Nucleosynthesis:Cosmic Rays