Probing Alpha Clustering for X-ray Burst Nucleosynthesis in a Symmetry-Adapted Framework
ORAL
Abstract
I discuss a new framework for studying clustering and determining alpha partial widths, asymptotic normalization coefficients (ANC), and alpha-capture reaction rates for narrow resonances, using symmetry-adapted wave functions. I will demonstrate the method through the well-studied $^{\mathrm{20}}$Ne system, by calculating the overlap between the $^{\mathrm{16}}$O$+$alpha cluster configuration and states in $^{\mathrm{20}}$Ne calculated in two different symmetry-adapted no core shell model formalisms. I will focus on the 5.79-MeV 1- state in $^{\mathrm{20}}$Ne and its alpha partial width, and discuss the $^{\mathrm{16}}$O(alpha, gamma)$^{\mathrm{20}}$Ne reaction rate at astrophysical temperatures. This ultimately is used to explore impacts on simulated X-ray burst abundance patterns.
*Supported by the U.S. NSF (ACI-1713690, OIA-1738287, PHY-1913728), the Czech SF (16-16772S) and SURA, and performed under the auspices of the DOE by LLNL under Contract No. DE-AC52-07NA27344, with support from LDRD projects 16-ERD-022 and 19-ERD-017, as well as the SCGSR program administered by ORISE for the DOE and managed by ORAU under Contract No. DE-SC0014664. Benefitted from computing resources provided by Blue Waters, NERSC, and LSU HPC, and resources by JINA CEE.
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