First Direct Measurement of an Astrophysical p-Process Reaction Cross Section Using a Radioactive Ion Beam
| Autor: | A. Lennarz, Corina Andreoiu, G. Hackman, D. Walter, A. M. Amthor, M. Williams, Barry Davids, N. E. Esker, V. Bildstein, J. Williams, Thomas Rauscher, D. Yates, F. H. Garcia, W. N. Catford, B. Wallis, A. R. L. Kennington, A. B. Garnsworthy, S. A. Gillespie, S. S. Bhattacharjee, C. Paxman, C. R. Natzke, C. Burbadge, Gavin Lotay, Eva Kasanda, Martín Alcorta, H. Behnamian, R. S. Lubna, N. Nishimura, B. Olaizola, S. Jazrawi, G. C. Ball, D. T. Doherty, Y. H. Kim, K. A. Hudson, D. Baal, S. Hallam, A. Psaltis, C. E. Svensson |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Ion beam Projectile FOS: Physical sciences General Physics and Astronomy Kinetic energy 01 natural sciences p-process 3. Good health Core (optical fiber) Nuclear physics Cross section (physics) Supernova 0103 physical sciences Nuclear Experiment (nucl-ex) 010306 general physics Nuclear Experiment 010303 astronomy & astrophysics Radioactive beam |
| Zdroj: | Physical review letters. 127(11) |
| ISSN: | 1079-7114 |
| Popis: | 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. 6 pages, 4 figures, published in Physical Review Letters |
| Databáze: | OpenAIRE |
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