Logo
ScienceStack
Table of Contents
Fetching ...
Sign In

Study of radiative proton capture by the 7Be nucleus with the use of ab initio approaches

D. Rodkin, Yu. Tchuvilsky

Abstract

A theoretical study of the 7Be(p,gamma)8B reaction in the astrophysical energy range with the use of ab initio methods is presented. The used approaches are No-Core Shell Model and Cluster Channels Orthogonal Functions Method. The scheme also contains elements of R-matrix theory and procedures for extrapolating various data obtained in ab initio computations. The developed approach as a whole allows one not only to calculate the astrophysical S-factor and all nuclear characteristics that determine its value, but also to evaluate the reliability of the obtained results and to identify the dominant reaction mechanisms against a background of insignificant ones.The high accuracy of the obtained results and has been demonstrated.

Study of radiative proton capture by the 7Be nucleus with the use of ab initio approaches

Abstract

A theoretical study of the 7Be(p,gamma)8B reaction in the astrophysical energy range with the use of ab initio methods is presented. The used approaches are No-Core Shell Model and Cluster Channels Orthogonal Functions Method. The scheme also contains elements of R-matrix theory and procedures for extrapolating various data obtained in ab initio computations. The developed approach as a whole allows one not only to calculate the astrophysical S-factor and all nuclear characteristics that determine its value, but also to evaluate the reliability of the obtained results and to identify the dominant reaction mechanisms against a background of insignificant ones.The high accuracy of the obtained results and has been demonstrated.

Paper Structure

This paper contains 4 sections, 33 equations, 2 figures, 2 tables.

Table of Contents

  1. Introduction
  2. Formalism of calculating spectroscopic factors, cluster form factors, asymptotic properties and widths of electromagnetic transitions
  3. Results of calculations of the properties of $^7$Be and $^8$B states, cross-section and astrophysical S-factor of proton radiative capture by $^{7}$Be
  4. Conclusions

Figures (2)

  • Figure 1: The cross-section and S-factor of radiative proton capture by $^7$Be nucleus for $\hbar \omega$ = 15 MeV and N$^*_{max}$ = 12.
  • Figure 2: The contribution of $^8$B resonances to cross-section and S-factor of radiative proton capture by $^7$Be.