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  • G. Lotay
  • S. A. Gillespie
  • M. Williams
  • M. Alcorta
  • A. M. Amthor
  • C. A. Andreoiu
  • D. Baal
  • G. C. Ball
  • S. S. Bhattacharjee
  • H. Behnamian
  • V. Bildstein
  • C. Burbadge
  • W. N. Catford
  • D. T. Doherty
  • N. E. Esker
  • F. H. Garcia
  • A. B. Garnsworthy
  • G. Hackman
  • S. Hallam
  • K. A. Hudson
  • S. Jazrawi
  • E. Kasanda
  • A. R.L. Kennington
  • Y. H. Kim
  • A. Lennarz
  • R. S. Lubna
  • C. R. Natzke
  • N. Nishimura
  • B. Olaizola
  • C. Paxman
  • A. Psaltis
  • C. E. Svensson
  • J. Williams
  • B. Wallis
  • D. Yates
  • D. Walter
  • B. Davids
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Original languageEnglish
Article number112701
JournalPhysical Review Letters
Volume127
Issue11
DOIs
Publication statusPublished - 10 Sep 2021
Externally publishedYes

Abstract

We have performed the first direct measurement of the Rb83(p,γ) radiative capture reaction cross section in inverse kinematics using a radioactive beam of Rb83 at incident energies of 2.4 and 2.7A 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 Sr84 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.

Notes

Funding Information: The authors acknowledge the generous support of the Natural Sciences and Engineering Research Council of Canada. TRIUMF receives federal funding via a contribution agreement through the National Research Council of Canada. The GRIFFIN infrastructure was funded jointly by the Canada Foundation for Innovation, the Ontario Ministry of Research and Innovation, the British Columbia Knowledge Development Fund, TRIUMF, and the University of Guelph. UK personnel were supported by the Science and Technologies Facilities Council (STFC). T. R. acknowledges support by the European COST action “ChETEC" (Grant No. CA16117). N. N. acknowledges support by JSPS KAKENHI (Grants No. 19H00693, No. 21H01087). Publisher Copyright: © 2021 American Physical Society.

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