Electromagnetic Cascades and Cascade Nucleosynthesis in the Early Universe

Details Electromagnetic Cascades and Cascade Nucleosynthesis in the Early Universe Electromagnetic Cascades and Cascade Nucleosynthesis in the Early Universe

1994-09-02

arxiv.org/abs/astro-ph/9409004v2

Phys.Rev.D51:4134-4144,1995

Astronomy and Astrophysics

Astrophysics

compressed and uuencoded postscript. We now include a comparison with previous work of the photon spectrum in the cascade and

Scientific paper

10.1103/PhysRevD.51.4134

We describe a calculation of electromagnetic cascading in radiation and matter in the early universe initiated by the decay of massive particles or by some other process. We have used a combination of Monte Carlo and numerical techniques which enables us to use exact cross sections, where known, for all the relevant processes. In cascades initiated after the epoch of big bang nucleosynthesis $\gamma$-rays in the cascades will photodisintegrate $^4$He, producing $^3$He and deuterium. Using the observed $^3$He and deuterium abundances we are able to place constraints on the cascade energy deposition as a function of cosmic time. In the case of the decay of massive primordial particles, we place limits on the density of massive primordial particles as a function of their mean decay time, and on the expected intensity of decay neutrinos.

Affiliated with

Also associated with

No associations

Rating

Electromagnetic Cascades and Cascade Nucleosynthesis in the Early Universe does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Electromagnetic Cascades and Cascade Nucleosynthesis in the Early Universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromagnetic Cascades and Cascade Nucleosynthesis in the Early Universe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-280441