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

Autor: Lotay G; Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom., Gillespie SA; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Williams M; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Department of Physics, University of York, Heslington, York YO10 5DD, United Kingdom., Rauscher T; Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland.; Centre for Astrophysics Research, University of Hertfordshire, Hatfield AL10 9AB, United Kingdom., Alcorta M; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Amthor AM; Department of Physics and Astronomy, Bucknell University, Lewisburg, Pennsylvania 17837, USA., Andreoiu CA; Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada., Baal D; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Ball GC; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Bhattacharjee SS; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Behnamian H; Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada., Bildstein V; Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada., Burbadge C; Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada., Catford WN; Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom., Doherty DT; Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom., Esker NE; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Garcia FH; Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada., Garnsworthy AB; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Hackman G; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Hallam S; Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom., Hudson KA; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada., Jazrawi S; Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom., Kasanda E; Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada., Kennington ARL; Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom., Kim YH; Department of Nuclear Engineering, Hanyang University, Seoul 04763, Republic of Korea., Lennarz A; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Lubna RS; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Natzke CR; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA., Nishimura N; Astrophysical Big Bang Laboratory, CPR, RIKEN, Wako, Saitama 351-0198, Japan., Olaizola B; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Paxman C; Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Psaltis A; Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4L8, Canada., Svensson CE; Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada., Williams J; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Wallis B; Department of Physics, University of York, Heslington, York YO10 5DD, United Kingdom., Yates D; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Department of Physics and Astronomy, University of British Columbia, Vancouver BC V6T 1Z4, Canada., Walter D; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada., Davids B; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.; Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2021 Sep 10; Vol. 127 (11), pp. 112701.
DOI: 10.1103/PhysRevLett.127.112701
Abstrakt: 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.
Databáze: MEDLINE