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.
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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.