Reaction Rate Of p14N --> 15Ogamma Capture To All Bound States In Potential Cluster Model

TL;DR

This paper models the astrophysical S-factor of the 14N(p,gamma)15O reaction using a modified potential cluster approach, successfully describing experimental data for multiple excited states and providing reaction rates across a wide temperature range.

Contribution

It introduces a new physical interpretation of the capture mechanism in the 14N(p,gamma)15O reaction within the potential cluster model, accounting for all bound states and resonances.

Findings

Successfully describes experimental S-factors for five excited states

Provides a parametrization of the total reaction rate with 5% accuracy

Supports the assumption that resonances are D scattering waves

Abstract

Review of calculation results for astrophysical S-factor of the 14N(p,gamma)15O capture reaction in the p14N channel of 15O was presented. It was carried out in the frame of the modified potential cluster model, taking into account resonances in the 15O spectrum up to 3.2 MeV at energy of incident protons varying from 30 keV to 5 MeV. It is possible to describe experimental data for the astrophysical S-factors of the radiative proton capture on 14N to five excited states of 15O at excitation energies from 5.18 MeV to 6.86 MeV, only under assumption, that all five resonances are D scattering waves. Quality new physical interpretation of the capture mechanism is discussed in this channel to the ground state of 15O. Carried out by us assumption that the ground state of 15O is determined by the p14N* channel with excited 14N* cluster, immediately allowed us to correctly describe order of values of the experimental S-factor for capture to this state. Taking into account these results, the total S-factor of the proton capture on 14N and the reaction rates to the ground and five excited states of 15O were determined at temperatures from 0.01 to 10 T9. The parametrization of the total reaction rate with a simple form is performed, which allows to obtain xi2 equal to 0.06 with 5% errors of the calculated rate.