Towards an Improved Measurement of the Radium-225 Electric Dipole Moment

ORAL

Abstract

Searches for permanent electric dipole moments (EDMs) in non-degenerate systems are sensitive probes of beyond-standard-model symmetry violation that could explain the dominance of matter over anti-matter. 225Ra (t1/2=15 d, I=1/2) is a particularly attractive system to use for an EDM measurement because its octupole-deformed nucleus, closely spaced nuclear ground-state parity doublet, and highly relativistic electrons make 225Ra uniquely sensitive to symmetry-violating interactions in the nuclear medium. Previous measurements have limited the EDM of 225Ra to less than 1.4 × 10-23 e cm (95% CL). We report progress toward implementing several experimental upgrades that will enable measurements at the 10-26 e cm level. In particular, we report progress on laser cooling and trapping radium using the strong, dipole allowed 1S0 to 1P1 transition at 483 nm that will greatly increase the number of atoms participating in EDM measurements.

*This work is supported the U.S. DOE, Office of Science, Office of Nuclear Physics, under contracts DE-AC02-06CH11357 and DE-SC0019455.

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Presenters

  • Michael N Bishof

    • Argonne National Laboratory

Authors

  • Michael N Bishof

    • Argonne National Laboratory

  • Gordon Arrowsmith-Kron

    • Michigan State University, Facility for Rare Isotope Beams

  • Kevin G Bailey

    • Argonne National Laboratory

  • Aiden Boyer

    • Facility for Rare Isotope Beams
    • Michigan State University, Facility for Rare Isotope Beams

  • Harvey Campos-Chavez

    • Argonne National Laboratory

  • Himanshi Himanshi

    • Facility for Rare Isotope Beams
    • Michigan State University, Facility for Rare Isotope Beams

  • Peter Mueller

    • Argonne National Laboratory

  • Thomas P O'Connor

    • Argonne National Laboratory

  • Jaideep T Singh

    • Facility for Rare Isotope Beams, Michigan State University
    • Michigan State University, Facility for Rare Isotope Beams