Study of the Alm26(d,p)Al27 Reaction and the Influence of the Al26 0+ Isomer on the Destruction of Al26 in the Galaxy Academic Article uri icon

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abstract

  • The existence of ^{26}Al (t_{1/2}=7.17×10^{5}  yr) in the interstellar medium provides a direct confirmation of ongoing nucleosynthesis in the Galaxy. The presence of a low-lying 0^{+} isomer (^{26}Al^{m}), however, severely complicates the astrophysical calculations. We present for the first time a study of the ^{26}Al^{m}(d,p)^{27}Al reaction using an isomeric ^{26}Al beam. The selectivity of this reaction allowed the study of ℓ=0 transfers to T=1/2, and T=3/2 states in ^{27}Al. Mirror symmetry arguments were then used to constrain the ^{26}Al^{m}(p,γ)^{27}Si reaction rate and provide an experimentally determined upper limit of the rate for the destruction of isomeric ^{26}Al via radiative proton capture reactions, which is expected to dominate the destruction path of ^{26}Al^{m} in asymptotic giant branch stars, classical novae, and core collapse supernovae.

authors

  • Almaraz-Calderon, S
  • Rehm, KE
  • Gerken, N
  • Avila, ML
  • Kay, BP
  • Talwar, R
  • Ayangeakaa, AD
  • Bottoni, S
  • Chen, Alan
  • Deibel, CM
  • Dickerson, C
  • Hanselman, K
  • Hoffman, CR
  • Jiang, CL
  • Kuvin, SA
  • Nusair, O
  • Pardo, RC
  • Santiago-Gonzalez, D
  • Sethi, J
  • Ugalde, C

publication date

  • August 18, 2017