Beta-delayed neutron emission in the deformed nucleus <sup>44</sup>S

ORAL

Abstract

The decay of N=28 44S was studied in the FRIB Decay Station Initiator [1] experiment e21062b. Analysis of the neutron spectrum from the 44Cl to 43Cl neutron emission, following beta decay of 44S, revealed unexpected results. Comparing intensities of neutron peaks populating the ground and low-lying states of 43Cl, we observed much higher ground-state population than predicted by Hauser-Feshbach statistical model calculations [2]. The ground state of 44S is believed to be moderately deformed (e.g., [3,4], among others), and the neutron-unbound states in 44Cl populated in beta decay may be similarly deformed. We present an interpretation of the discrepancy between experiment and statistical theory as the result of transitions between deformed states in 44S, 44Cl, and 43Cl.

[1] https://fds.ornl.gov/initiator/

[2] W. Hauser and H. Feshbach, Phys. Rev. 87, 366 (1952)

[3] C. Force et al., Phys. Rev. Lett. 105, 102501 (2010)

[4] P. Möller et al., Atomic Data and Nuclear Tables 109-110, 1-204 (2016)

*This research was partly sponsored by the NNSA under the Stewardship Science Academic Alliances program through DOE Cooperative Agreements No. DE-NA0004068 and Office of Science, Office of Nuclear Physics under Contracts No. DE-FG02-96ER40983 (UTK), DE-AC05-00OR22725 (ORNL)

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Presenters

  • Nico Braukman

    • University of Tennessee, Knoxville

Authors

  • Nico Braukman

    • University of Tennessee, Knoxville

  • Robert K. Grzywacz

    • University of Tennessee

  • Zhengyu Xu

    • University of Tennessee

  • Heather L Crawford

    • Lawrence Berkeley National Laboratory

  • James M Allmond

    • Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

  • Benjamin P Crider

    • Mississippi State University

  • Vandana Tripathi

    • Florida State University