Upgrades for an Improved Measurement of the Permanent EDM of Ra-225

ORAL

Abstract

A non-zero Electric Dipole Moment (EDM) in a non-degenerate system violates time-reversal (T) symmetry and consequently also charge-parity (CP) symmetry. ~EDM measurements are therefore sensitive searches for new CP violating interactions. The octupole deformation and nearly degenerate nuclear parity doublet in Ra-225 make it an attractive candidate for probing CP violations in the hadronic sector. Further experimental upgrades are being implemented to enhance the current EDM sensitivity for Ra-225. These include more than a factor of three enhancement in the electric field from our electrode upgrade and a STIRAP-based electron shelving for improved state detection efficiency. With these upgrades in place our EDM sensitivity should increase by about two orders of magnitude and allow us to substantially improve constraints on certain T-violating processes within the nucleus. Updates on the status of these upgrades will be provided. This work is supported by the U.S. DOE, Office of Science, Office of Nuclear Physics, under contract DE-AC02-06CH11357 and the Michigan State University.

Authors

  • Tenzin Rabga

    • Argonne National Lab, Michigan State University
  • Kevin Bailey

    • Argonne National Lab
  • Michael Bishof

    • Argonne National Lab
  • Donald Booth

    • Argonne National Lab
  • Matthew Dietrich

    • Argonne National Lab
  • John Greene

    • Argonne National Lab
  • Peter Mueller

    • Argonne National Lab
  • Thomas O'Connor

    • Argonne National Lab
  • Zheng-Tian Lu

    • University of Science and Technology of China
  • Roy Ready

    • Michigan State University
  • Jaideep Singh

    • Michigan State University
  • Tian Xia

    • University of Science and Technology of China