Revised decay properties of the key 93-keV resonance in the <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mmultiscripts><mi>Mg</mi><mprescripts></mprescripts><none></none><mn>25</mn></mmultiscripts><mo>(</mo><mi>p</mi><mo>,</mo><mi>γ</mi><mo>)</mo></mrow></math> reaction and its influence on the MgAl cycle in astrophysical environments

G. Lotay; D. T. Doherty; R. V. F. Janssens; D. Seweryniak; H. M. Albers; S. Almaraz-Calderon; M. P. Carpenter; A. E. Champagne; C. J. Chiara; C. R. Hoffman; C. Iliadis; A. Kankainen; T. Lauritsen; S. Zhu

doi:10.1103/PhysRevC.105.L042801

Letter

Revised decay properties of the key 93-keV resonance in the ${}^{25}{Mg} (p, γ)$ reaction and its influence on the MgAl cycle in astrophysical environments

G. Lotay¹, D. T. Doherty¹, R. V. F. Janssens ^2,3, D. Seweryniak⁴, H. M. Albers^4,*, S. Almaraz-Calderon^4,†, M. P. Carpenter ⁴, A. E. Champagne ^2,3, C. J. Chiara^4,5,‡ et al.

C. R. Hoffman⁴, C. Iliadis ^2,3, A. Kankainen ⁶, T. Lauritsen ⁴, and S. Zhu^4,§

¹Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
²Department of Physics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
³Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27708, USA
⁴Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
⁵Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
⁶Department of Physics, University of Jyväskylä, FI-40014 Jyväskylä, Finland

^*Present address: GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany.
^†Present address: Department of Physics, Florida State University, Tallahassee, Florida 32306, USA.
^‡Present address: U.S. Army Research Laboratory, Adelphi, Maryland 20783, USA.
^§Deceased

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Phys. Rev. C 105, L042801 – Published 4 April, 2022

DOI: https://doi.org/10.1103/PhysRevC.105.L042801

Abstract

The $γ$ -decay properties of an excited state in ${}^{26}{Al}$ at 6398.3(8) keV have been reexamined using the ${}^{11}B + {}^{16}O$ fusion-evaporation reaction. This level represents a key 93.1(8)-keV resonance in the ${}^{25}{Mg} + p$ system and its relative branching to the ${}^{26}{Al}$ ground state, $f_{0}$ , has been determined to be $0.76 \pm 0.03$ (stat.) $\pm 0.10$ (syst.). This is a significantly higher value than the most recent evaluation and implies a considerable increase in the production of cosmic $γ$ rays from ${}^{26}{Al}$ radioactivity.

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Physical Review C

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Revised decay properties of the key 93-keV resonance in the ${}^{25}{Mg} (p, γ)$ reaction and its influence on the MgAl cycle in astrophysical environments

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Revised decay properties of the key 93-keV resonance in the Mg25(p,γ) reaction and its influence on the MgAl cycle in astrophysical environments

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Revised decay properties of the key 93-keV resonance in the ${}^{25}{Mg} (p, γ)$ reaction and its influence on the MgAl cycle in astrophysical environments