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Null result on a predicted near-threshold resonance in <sup>7</sup>Li

ORAL

Abstract

The No Core Shell Model with Continuum (NCSMC) recently predicted an S-wave resonance just above the 6He+p decay threshold [1]. The 6He(d,n)7Li reaction was employed at the Texas A&M Cyclotron Institute to selectively populate this near-threshold resonance and search for its proton decay via the invariant-mass method. The energy and width were measured for the 3/2- Isobaric analogue state in 7Li at 11.295 MeV and a new state above that in energy was found. No evidence of the predicted near-threshold resonance was found, leading to a discussion on the origin of the calculated state within the NCSMC.

[1] M. Vorabbi, P. Navrátil, S. Quaglioni, and G. Hupin, Be-7 and Li-7 Nuclei within the No-Core Shell Model with Continuum, Phys. Rev. C 100, 024304 (2019).

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Publication: N. Dronchi et al., Search for an S-Wave Resonance in 7Li Just above the Proton-Decay Threshold, Phys. Rev. C 107, L061303 (2023).

Presenters

  • Nicolas Dronchi

    Washington University, St. Louis

Authors

  • Nicolas Dronchi

    Washington University, St. Louis

  • Jessica Berkman

    Washington University, St. Louis

  • Robert J Charity

    Washington University, St. Louis

  • Jon Elson

    Washington University

  • Lee G Sobotka

    Washington University, St. Louis

  • Anthony Thomas

    Washington University in St. Louis

  • Antti Saastamoinen

    Texas A&MUniversity

  • Marina Barbui

    Texas A&MUniversity

  • Jack E Bishop

    Texas A&M University

  • Cody E Parker

    Texas A&M University

  • Brian T Roeder

    Texas A&M Cyclotron Institute

  • Grigory V Rogachev

    Texas A&M University

  • Dustin P Scriven

    Texas A&M University

  • Scott T Marley

    Louisiana State University

  • Rachel M Shaffer

    Louisiana State University