Constraint of the Astrophysical $^{26g}$Al(p;γ)$^{27}$Si Destruction Rate at Stellar Temperatures
| Autor: | S D, Pain, D W, Bardayan, J C, Blackmon, S M, Brown, K Y, Chae, K A, Chipps, J A, Cizewski, K L, Jones, R L, Kozub, J F, Liang, C, Matei, M, Matos, B H, Moazen, C D, Nesaraja, J, Okołowicz, P D, O'Malley, W A, Peters, S T, Pittman, M, Płoszajczak, K T, Schmitt, J F, Shriner, D, Shapira, M S, Smith, D W, Stracener, G L, Wilson |
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| Přispěvatelé: | Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Physical Review Letters Physical Review Letters, 2015, 114 (21), pp.212501. ⟨10.1103/PhysRevLett.114.212501⟩ |
| ISSN: | 0031-9007 1079-7114 |
| DOI: | 10.1103/PhysRevLett.114.212501⟩ |
| Popis: | International audience; The Galactic 1.809-MeV γ-ray signature from the β decay of $^{26g}$Al is a dominant target of γ-rayastronomy, of which a significant component is understood to originate from massive stars. The$^{26g}$Al(p; γ)$^{27}$Si reaction is a major destruction pathway for $^{26g}$Al at stellar temperatures, but the reactionrate is poorly constrained due to uncertainties in the strengths of low-lying resonances in $^{27}$Si. The$^{26g}$Al(d; p)$^{27}$Al reaction has been employed in inverse kinematics to determine the spectroscopic factors,and hence resonance strengths, of proton resonances in $^{27}$Si via mirror symmetry. The strength of the127-keV resonance is found to be a factor of 4 higher than the previously adopted upper limit, and the upperlimit for the 68-keV resonance has been reduced by an order of magnitude, considerably constraining the$^{26g}$Al destruction rate at stellar temperatures. |
| Databáze: | OpenAIRE |
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