We have performed the first direct measurement of the 83Rb(p,g) radiative capture reaction cross section in inverse kinematics using a radioactive beam of 83Rb at incident energies of 2.4 and 2.7 A MeV. The measured cross section at an effective relative kinetic energy of Ecm = 2.393 MeV, which lies within the relevant energy window for core collapse supernovae, is smaller than the prediction of statistical model calculations. This leads to the abundance of 84Sr produced in the astrophysical p process being higher than previously calculated. Moreover, the discrepancy of the present data with theoretical predictions indicates that further experimental investigation of p-process reactions involving unstable projectiles is clearly warranted.
@article{arxiv.2109.06775,
title = {First Direct Measurement of an Astrophysical p-Process Reaction Cross Section Using a Radioactive Ion Beam},
author = {G. Lotay and S. A. Gillespie and M. Williams and T. Rauscher and M. Alcorta and M. Amthor and C. A. Andreoiu and D. Baal and G. C. Ball and S. S. Bhattacharjee and H. Behnamian and V. Bildstein and C. Burbadge and W. N. Catford and D. T. Doherty and N. E. Esker and F. H. Garcia and A. B. Garnsworthy and G. Hackman and S. Hallam and K. A. Hudson and S. Jazrawi and E. Kasanda and A. R. L. Kennington and Y. H. Kim and A. Lennarz and R. S. Lubna and C. R. Natzke and N. Nishimura and B. Olaizola and C. Paxman and A. Psaltis and C. E. Svensson and J. Williams and B. Wallis and D. Yates and D. Walter and B. Davids},
journal= {arXiv preprint arXiv:2109.06775},
year = {2021}
}
Comments
6 pages, 4 figures, published in Physical Review Letters