Neutrinos, neutron capture, and fission cycling: Consequences for supernova nucleosynthesis

Details Neutrinos, neutron capture, and fission cycling: Consequences for supernova nucleosynthesis Neutrinos, neutron capture, and fission cycling: Consequences for supernova nucleosynthesis

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008phdt........21b&link_type=abstract

Proquest Dissertations And Theses 2008. Section 0155, Part 0606 103 pages; [Ph.D. dissertation].United States -- North Carolina

Astronomy and Astrophysics

Astrophysics

Neutrinos, Neutron Capture, Fission Cycling, Supernova, Nucleosynthesis

Scientific paper

A long-standing problem in the field of nuclear astrophysics is the question of which astrophysical environment(s) serves as a host to the elemental production process known as the r -process. The r -process is the sequence of nuclear reactions that is responsible for producing the heaviest elements in nature and generates about half of the solar system abundance of nuclei with A >= 100. While the basic recipe for generating r -process elements is understood, the production of heavy nuclei through repetitions of neutron capture and b-decay, determining the astrophysical production site of the r -process has remained elusive. We examine how the r -process environment would be affected by the presence of a sterile neutrino, and we find that the resulting conditions yield an r -process that can reproduce the observed r -process abundance pattern more closely than other models of the r -process. We explore the r -process under conditions where both fission cycling and steady-b flow obtain and find that these mechanisms can jointly operate in the r -process to yield an abundance pattern that reproduces the features of the halo star data. We have examined the role that individual neutron capture cross sections play in the r -process and, contrary to conventional wisdom, find that the evolution of the r -process is sensitive to the neutron capture cross sections of certain, critical nuclei.

Affiliated with

Also associated with

No associations

Rating

Neutrinos, neutron capture, and fission cycling: Consequences for supernova nucleosynthesis 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 Neutrinos, neutron capture, and fission cycling: Consequences for supernova nucleosynthesis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Neutrinos, neutron capture, and fission cycling: Consequences for supernova nucleosynthesis will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1250036