First β-Decay Half-Life Measurements of <sup>31</sup>F and <sup>37</sup>Na Using FDSI
ORAL · Invited
Abstract
The Facility for Rare Isotope Beams (FRIB) has provided unprecedented access to isotopes far from stability, enabling
a detailed investigation of nuclear structure under extreme conditions. In this work, we report the first β-decay half-life
measurements of the neutron-rich isotopes 31F and 37Na, where 31F is the most neutron-rich fluorine isotope observed
to date. These measurements were performed as part of a β-decay spectroscopy campaign using the FRIB Decay
Station Initiator (FDSI). Studying the β-decay properties of nuclei in this region offers critical insight into shell evolution
and structural changes driven by significant neutron-to-proton imbalance.
The reported results represent the shortest β-decay half-lives measured to date and serve as sensitive benchmarks
for theoretical shell-model calculations in the N = 28 region. The measured half-lives show good agreement with
predictions from the SDPFSDG shell-model interaction [1], reinforcing the role of advanced shell-model frameworks
in describing exotic nuclei. These findings demonstrate the capability of the FDSI setup to probe the most neutron-
rich systems accessible today and to deliver essential data for refining our understanding of nuclear forces and shell
evolution near the neutron drip line.
References
[1] S. Yosida et al., Phys. Rev. C 97, 054321; Erratum Phys. Rev. C 109, 029904 (2024)
a detailed investigation of nuclear structure under extreme conditions. In this work, we report the first β-decay half-life
measurements of the neutron-rich isotopes 31F and 37Na, where 31F is the most neutron-rich fluorine isotope observed
to date. These measurements were performed as part of a β-decay spectroscopy campaign using the FRIB Decay
Station Initiator (FDSI). Studying the β-decay properties of nuclei in this region offers critical insight into shell evolution
and structural changes driven by significant neutron-to-proton imbalance.
The reported results represent the shortest β-decay half-lives measured to date and serve as sensitive benchmarks
for theoretical shell-model calculations in the N = 28 region. The measured half-lives show good agreement with
predictions from the SDPFSDG shell-model interaction [1], reinforcing the role of advanced shell-model frameworks
in describing exotic nuclei. These findings demonstrate the capability of the FDSI setup to probe the most neutron-
rich systems accessible today and to deliver essential data for refining our understanding of nuclear forces and shell
evolution near the neutron drip line.
References
[1] S. Yosida et al., Phys. Rev. C 97, 054321; Erratum Phys. Rev. C 109, 029904 (2024)
*This work was supported by the Department of Energy (DOE) and the National Science Foundation (NSF) under Grant No. PHY-1848177 (CAREER) and PHY-2412343.
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Presenters
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Tawfik Mohammed Mosaad Gaballah
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, MS 39762, USA
- Mississippi State University