First Direct Measurement of an Astrophysical p-Process Reaction Cross Section Using a Radioactive Ion Beam

Lotay, G. and Gillespie, S. A. and Williams, M. and Rauscher, T. and Alcorta, M. and Amthor, A. M. and Andreoiu, C. A. and Baal, D. and Ball, G. C. and Bhattacharjee, S. S. and Behnamian, H. and Bildstein, V. and Burbadge, C. and Catford, W. N. and Doherty, D. T. and Esker, N. E. and Garcia, F. H. and Garnsworthy, A. B. and Hackman, G. and Hallam, S. and Hudson, K. A. and Jazrawi, S. and Kasanda, E. and Kennington, A. R. L. and Kim, Y. H. and Lennarz, A. and Lubna, R. S. and Natzke, C. R. and Nishimura, N. and Olaizola, B. and Paxman, C. and Psaltis, A. and Svensson, C. E. and Williams, J. and Wallis, B. and Yates, D. and Walter, D. and Davids, B.. (2021) First Direct Measurement of an Astrophysical p-Process Reaction Cross Section Using a Radioactive Ion Beam. Physical Review Letters, 127 (11). p. 112701.

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We have performed the first direct measurement of the ^{83}Rb(p,γ) radiative capture reaction cross section in inverse kinematics using a radioactive beam of ^{83}Rb at incident energies of 2.4 and 2.7A MeV. The measured cross section at an effective relative kinetic energy of E_{cm}=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 ^{84}Sr 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.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Theoretische Physik Astrophysik (Thielemann)
UniBasel Contributors:Rauscher, Thomas
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:05 Oct 2021 10:20
Deposited On:05 Oct 2021 10:14

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