Recently Synthesized r-Process Nuclei: Ultra-Heavy Cosmic Rays and Peculiar Stars.
Abstract
Recently synthesized (t approximately < 1 billion years) r-process material has actinide elemental and isotopic abundance characteristics which can be used to distinguish it from ancient r-process material. The time dependence of relative actinide abundances provide detailed chronometric information. Also it is shown that, if N = 184 is a neutron magic number as predicted by nuclear theory, the resulting r-process production peak at A approximately equal to 281 will in turn yield, due to symmetric fission, a broad abundance peak around A approximately equal to 135-140. The present results can be used to help verify or refute some current hypotheses concerning the origin of UH cosmic rays and some of the abundance anomalies in peculiar stars. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 19, 1974
- Accession Number
- AD0778931
Entities
People
- Bernard Blake
- D. N. Schramm
Organizations
- The Aerospace Corporation