Above-Barrier Coulomb Excitation of <sup>78</sup>Kr with the JANUS Setup

ORAL

Abstract

The JANUS setup [1] has been used for sub-barrier projectile Coulomb excitation measurements with rare and stable isotopes [1-8] at Michigan State University since its commissioning with 78Kr beam Coulomb-excited on a 208Pb target [1]. In the same experiment, JANUS was also used to explore the population of excited states in the inelastic scattering of 78Kr beam on 48Ti target at an energy that is 150% of the Coulomb barrier. In this regime of “unsafe” Coulomb excitation, higher-energy and higher-spin states were shown to be excited [9]. The angular coverage and particle-gamma detection scheme of JANUS allowed to track how the population patterns change for the excited states of 78Kr when entering such a highly “unsafe” regime. The results for 78Kr will be presented and the potential for using JANUS for spectroscopy following unsafe Coulomb excitation will be discussed.

[1] E. M. Lunderberg et al., Nucl. Inst. and Meth. in Phys. Res. A 885, 30 (2018)

[2] J. Henderson et al., Phys. Rev. Lett. 121, 8 (2018)

[3] J. Henderson et al., Phys. Rev. C. 99, 5 (2019)

[4] D. Rhodes et al., Phys. Rev. C. 103, 5 (2021)

[5] D. Rhodes et al., Phys. Rev. C. 105, 2 (2022)

[6] S. Kisyov et al., Phys. Rev. C. 106, 3 (2022)

[7] R. Russell et al., Phys. Rev. C. 108, 6 (2023)

[8] J. Heery et al., Phys. Rev. C. 109, 1 (2024)

[9] D. Ward et al., Nucl. Phys. A 600 (1996)

*This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Award No. DE-SC0023633.

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Publication: [1] E. M. Lunderberg et al., Nucl. Inst. and Meth. in Phys. Res. A 885, 30 (2018)
[2] J. Henderson et al., Phys. Rev. Lett. 121, 8 (2018)
[3] J. Henderson et al., Phys. Rev. C. 99, 5 (2019)
[4] D. Rhodes et al., Phys. Rev. C. 103, 5 (2021)
[5] D. Rhodes et al., Phys. Rev. C. 105, 2 (2022)
[6] S. Kisyov et al., Phys. Rev. C. 106, 3 (2022)
[7] R. Russell et al., Phys. Rev. C. 108, 6 (2023)
[8] J. Heery et al., Phys. Rev. C. 109, 1 (2024)
[9] D. Ward et al., Nucl. Phys. A 600 (1996)

Presenters

  • Joseph Chung-Jung

    • Michigan State University/FRIB

Authors

  • Joseph Chung-Jung

    • Michigan State University/FRIB

  • Ava M Hill

    • Michigan State University/FRIB

  • Alexandra Gade

    • Michigan State University/FRIB

  • Daniel M Rhodes

    • Lawrence Livermore National Laboratory

  • Dirk Weisshaar

    • FRIB

  • Stephen A Gillespie

    • FRIB

  • Eric Lunderberg

    • NSCL

  • Joseph Belarge

    • NSCL

  • Peter C Bender

    • University of Massachusetts Lowell

  • Brian M Bucher

    • Idaho National Laboratory

  • Brandon Elman

    • Michigan State University

  • Sean N Liddick

    • Facility for Rare Isotope Beams, Michigan State University

  • Brenden Longfellow

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Christopher Prokop

    • Los Alamos National Laboratory

  • Ching-Yen Wu

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory