NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Primordial nucleosynthesis with decaying particles. I - Entropy-producing decays. II - Inert decaysThe effect of a nonrelativistic particle X, which decays out of equilibrium, on primordial nucleosynthesis is investigated, including both the energy density of the X particle and the electromagnetic entropy production from its decay. The results are parametrized in terms of the X particle lifetime and the density parameter rm(X), where m(X) is the X particle mass and r is the ratio of X number density to photon number density prior to nucleosynthesis. The results rule out particle lifetimes greater than 1-10 s for large values of rm(X). The question of a decaying particle which produces no electromagnetic entropy in the course of its decay is addressed, and particles which produce both entropy and an inert component in their decay are discussed.
Document ID
19880060250
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Scherrer, Robert J.
(Chicago, University IL, United States)
Turner, Michael S.
(NASAFermi National Accelerator Laboratory, Batavia; Chicago, University IL, United States)
Date Acquired
August 13, 2013
Publication Date
August 1, 1988
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 331
ISSN: 0004-637X
Subject Category
Nuclear And High-Energy Physics
Accession Number
88A47477
Funding Number(s)
CONTRACT_GRANT: NSF PHY-86-04396
CONTRACT_GRANT: DE-AC02-80ER-10773
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available