$^{25}$Si $\beta$-decay spectroscopy using the Gaseous Detector with Germanium Tagging (GADGET) system

ORAL

Abstract

The protons and $\gamma$ rays emitted in $^{25}$Si $\beta$ decay were measured using the GADGET system. Three $^{24}$Mg $\gamma$-ray lines, eight $^{25}$Al $\gamma$-ray lines, and a 719-keV proton branch were observed for the first time in $^{25}$Si decay. A Monte Carlo method was used to model the Doppler broadening of $^{24}$Mg $\gamma$-ray lines caused by proton emissions. All the proton-bound states of $^{25}$Al are observed to be populated in the $\beta$ decay of $^{25}$Si. We have reported the first measurement of the $^{25}$Si $\beta$-delayed $\gamma$-ray intensities through the $^{25}$Al unbound states. An enhanced decay scheme of $^{25}$Si has been constructed and compared to the mirror decay of $^{25}$Na and the shell-model calculations using two newly-developed $sd$-shell Hamiltonians, USDC and USDI. This work offers insights into the fine nuclear structure of $^{25}$Al.

*This work was supported by the U.S. NSF under Grants No. PHY-1102511, PHY-1565546, PHY-1913554, and PHY-1811855, and the U.S. DOE, Office of Science, under award No. DE-SC0016052.

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Authors

  • Lijie Sun

    • National Superconducting Cyclotron Laboratory, MSU

  • Moshe Friedman

    • The Hebrew University of Jerusalem

  • Tamas Budner

    • National Superconducting Cyclotron Laboratory, MSU
    • National Superconducting Cyclotron Laboratory

  • David Pérez-Loureiro

    • Canadian Nuclear Laboratories

  • Emanuel Pollacco

    • Université Paris-Saclay

  • Chris Wrede

    • National Superconducting Cyclotron Laboratory, MSU
    • National Superconducting Cyclotron Laboratory

  • Alex Brown

    • NSCL/Dept. of Physics and Astronomy,MSU
    • National Superconducting Cyclotron Laboratory, MSU

  • Marco Cortesi

    • National Superconducting Cyclotron Laboratory
    • National Superconducting Cyclotron Laboratory, MSU

  • Cathleen Fry

    • Los Alamos National Laboratory
    • National Superconducting Cyclotron Laboratory, MSU

  • Brent Glassman

    • National Superconducting Cyclotron Laboratory, MSU

  • Joe Heideman

    • University of Tennessee Knoxville
    • National Superconducting Cyclotron Laboratory, MSU

  • Molly Janasik

    • National Superconducting Cyclotron Laboratory, MSU
    • National Superconducting Cyclotron Laboratory

  • Aaron Magilligan

    • Michigan State University
    • National Superconducting Cyclotron Laboratory, MSU

  • Michael Roosa

    • National Superconducting Cyclotron Laboratory, MSU

  • Jordan Stomps

    • National Superconducting Cyclotron Laboratory, MSU
    • National Superconducting Cyclotron Laboratory

  • Jason Surbrook

    • National Superconducting Cyclotron Laboratory, MSU
    • National Superconducting Cyclotron Laboratory

  • Pranjal Tiwari

    • National Superconducting Cyclotron Laboratory, MSU