Cross sections of the Rb83(p,γ)Sr84 and Kr84(p,γ)Rb85 reactions at energies characteristic of the astrophysical γ process

We have measured the cross section of the Rb83(p,γ)Sr84 radiative capture reaction in inverse kinematics using a radioactive beam of Rb83 at incident energies of 2.4 and 2.7A MeV. Prior to the radioactive beam measurement, the Kr84(p,γ)Rb85 radiative capture reaction was measured in inverse kinematics using a stable beam of Kr84 at an incident energy of 2.7A MeV. The effective relative kinetic energies of these measurements lie within the …