Cross sections of the ^{83}Rb(p ,γ )^{84}Sr and ^{84}Kr(p ,γ )^{85}Rb reactions at energies characteristic of the astrophysical γ process
Abstract
We have measured the cross section of the ^{83}Rb(p ,γ )^{84}Sr radiative capture reaction in inverse kinematics using a radioactive beam of ^{83}Rb at incident energies of 2.4 and 2.7 A MeV. Prior to the radioactive beam measurement, the ^{84}Kr(p ,γ )^{85}Rb radiative capture reaction was measured in inverse kinematics using a stable beam of ^{84}Kr at an incident energy of 2.7 A MeV. The effective relative kinetic energies of these measurements lie within the relevant energy window for the γ process in supernovae. The central values of the measured partial cross sections of both reactions were found to be 0.17 0.42 times the predictions of statistical model calculations. Assuming the predicted cross section at other energies is reduced by the same factor leads to a slightly higher calculated abundance of the p nucleus ^{84}Sr, caused by the reduced rate of the ^{84}Sr(γ ,p )^{83}Rb reaction derived from the present measurement.
 Publication:

Physical Review C
 Pub Date:
 March 2023
 DOI:
 10.1103/PhysRevC.107.035803
 arXiv:
 arXiv:2303.10282
 Bibcode:
 2023PhRvC.107c5803W
 Keywords:

 Nuclear Experiment;
 Astrophysics  Solar and Stellar Astrophysics
 EPrint:
 11 pages, 11 figures. arXiv admin note: text overlap with arXiv:2109.06775