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

G Lotay¹, S A Gillespie², M Williams^{2

3}, T Rauscher^{4

5}, M Alcorta², A M Amthor⁶, C A Andreoiu⁷, D Baal², G C Ball², S S Bhattacharjee², H Behnamian⁸, V Bildstein⁸, C Burbadge⁸, W N Catford¹, D T Doherty¹, N E Esker², F H Garcia⁷, A B Garnsworthy², G Hackman², S Hallam¹, K A Hudson^{2

9}, S Jazrawi¹, E Kasanda⁸, A R L Kennington¹, Y H Kim¹⁰, A Lennarz², R S Lubna², C R Natzke^{2

11}, N Nishimura¹², B Olaizola², C Paxman^{1

2}, A Psaltis¹³, C E Svensson⁸, J Williams², B Wallis³, D Yates^{2

14}, D Walter², B Davids^{2

9}

Affiliations

¹ Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
² TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.
³ Department of Physics, University of York, Heslington, York YO10 5DD, United Kingdom.
⁴ Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland.
⁵ Centre for Astrophysics Research, University of Hertfordshire, Hatfield AL10 9AB, United Kingdom.
⁶ Department of Physics and Astronomy, Bucknell University, Lewisburg, Pennsylvania 17837, USA.
⁷ Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada.
⁸ Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
⁹ Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada.
¹⁰ Department of Nuclear Engineering, Hanyang University, Seoul 04763, Republic of Korea.
¹¹ Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA.
¹² Astrophysical Big Bang Laboratory, CPR, RIKEN, Wako, Saitama 351-0198, Japan.
¹³ Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4L8, Canada.
¹⁴ Department of Physics and Astronomy, University of British Columbia, Vancouver BC V6T 1Z4, Canada.

PMID: 34558922
DOI: 10.1103/PhysRevLett.127.112701

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

G Lotay et al. Phys Rev Lett. 2021.

. 2021 Sep 10;127(11):112701.

doi: 10.1103/PhysRevLett.127.112701.

Authors

Affiliations

¹ Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
² TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.
³ Department of Physics, University of York, Heslington, York YO10 5DD, United Kingdom.
⁴ Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland.
⁵ Centre for Astrophysics Research, University of Hertfordshire, Hatfield AL10 9AB, United Kingdom.
⁶ Department of Physics and Astronomy, Bucknell University, Lewisburg, Pennsylvania 17837, USA.
⁷ Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada.
⁸ Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
⁹ Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada.
¹⁰ Department of Nuclear Engineering, Hanyang University, Seoul 04763, Republic of Korea.
¹¹ Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA.
¹² Astrophysical Big Bang Laboratory, CPR, RIKEN, Wako, Saitama 351-0198, Japan.
¹³ Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4L8, Canada.
¹⁴ Department of Physics and Astronomy, University of British Columbia, Vancouver BC V6T 1Z4, Canada.

PMID: 34558922
DOI: 10.1103/PhysRevLett.127.112701

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.

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

Affiliations

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

Authors

Affiliations

Abstract

LinkOut - more resources

Full Text Sources

Research Materials