Direct and sequential radiative three-body reaction rates at low temperatures

Details Direct and sequential radiative three-body reaction rates at low temperatures Direct and sequential radiative three-body reaction rates at low temperatures

2011-08-24

arxiv.org/abs/1108.4811v1

Physics

Nuclear Physics

Nuclear Theory

To be published in European Physical Journal A

Scientific paper

We investigate the low-temperature reaction rates for radiative capture processes of three particles. We compare direct and sequential capture mechanisms and rates using realistic phenomenological parametrizations of the corresponding photodissociation cross sections.Energy conservation prohibits sequential capture for energies smaller than that of the intermediate two-body structure. A finite width or a finite temperature allows this capture mechanism. We study generic effects of positions and widths of two- and three-body resonances for very low temperatures. We focus on nuclear reactions relevant for astrophysics, and we illustrate with realistic estimates for the $\alpha$-$\alpha$-$\alpha$ and $\alpha$-$\alpha$-$n$ radiative capture processes. The direct capture mechanism leads to reaction rates which for temperatures smaller than 0.1 GK can be several orders of magnitude larger than those of the NACRE compilation.

Affiliated with

Also associated with

No associations

Rating

Direct and sequential radiative three-body reaction rates at low temperatures 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 Direct and sequential radiative three-body reaction rates at low temperatures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct and sequential radiative three-body reaction rates at low temperatures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-377531