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

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abstract

  • 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.

authors

  • Lotay, G
  • Gillespie, SA
  • Williams, M
  • Rauscher, T
  • Alcorta, M
  • Amthor, AM
  • Andreoiu, CA
  • Baal, D
  • Ball, GC
  • Bhattacharjee, SS
  • Behnamian, H
  • Bildstein, V
  • Burbadge, C
  • Catford, WN
  • Doherty, DT
  • Esker, NE
  • Garcia, FH
  • Garnsworthy, AB
  • Hackman, G
  • Hallam, S
  • Hudson, KA
  • Jazrawi, S
  • Kasanda, E
  • Kennington, ARL
  • Kim, YH
  • Lennarz, Annika
  • Lubna, RS
  • Natzke, CR
  • Nishimura, N
  • Olaizola, B
  • Paxman, C
  • Psaltis, A
  • Svensson, CE
  • Williams, J
  • Wallis, B
  • Yates, D
  • Walter, D
  • Davids, B

publication date

  • September 2021