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Contributions of the $^{24}$Al Isomer to rp-process Nucleosynthesis

ORAL

Abstract

The $^{24}$Al(p,$\gamma$)$^{25}$Si reaction, is a key step in rp-process nucleosynthesis taking nuclear material out of the Ne-Na region into heavier elements. The rate of this reaction is also important in the identification of isotopic silicon abundances in presolar grains. The existence of low-lying isomers in nuclei could impact rate calculations in astrophysical scenarios. The $^{24}$Na$^{m}$(d,p)$^{25}$Na reaction was studied at the John D. Fox Accelerator Laboratory at Florida State University using a radioactive beam of $^{24}$Na with 90$\%$ of its content in its 1$^{+}$ isomeric state (E$_{ex}$ = 0.472 MeV, t$_{1/2}$ = 20.18 ms). This reaction selectively populated $\ell$ = 0 transfers, allowing the study of low-spin states in $^{25}$Na. Mirror symmetry arguments were then used to extract experimental information of unbound states in $^{25}$Si populated by proton captures on the 1+ isomeric state in $^{24}$Al. In this talk, results of the experiment and astrophysical implications will be presented.

Publication: Study of the $^{24}$Na$^{m}$(d,p)$^{25}$Na Reaction and the Influence of $^{24}$Al$^{m}$ isomer on rp-process Nucleosynthesis (submitted for publication)

Presenters

  • Nathan A Gerken

    Florida State University

Authors

  • Nathan A Gerken

    Florida State University

  • Sergio J Almaraz-Calderon

    Florida State University

  • Benjamin W Asher

    Florida State University, Florida State University, Tallahassee, FL.

  • Eilens L Lopez Saavedra

    Florida State University, Florida State University, Tallahassee, FL.

  • Lagy T Baby

    Florida State University, Florida State University, Tallahassee, FL.

  • Kirby W Kemper

    Florida State University

  • Ashton B Morelock

    Florida State University, Florida State University, Tallahassee, FL.

  • Jesus F Perello

    Florida State University

  • Alexander S Volya

    Florida State University

  • Ingo L Wiedenhoever

    Florida State University, Florida State University, Tallahassee, FL.