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Title: First Measurement of the Atomic Electric Dipole Moment of Ra 225

Abstract

The radioactive radium-225 (Ra-225) atom is a favorable case to search for a permanent electric dipole moment. Because of its strong nuclear octupole deformation and large atomic mass, Ra-225 is particularly sensitive to interactions in the nuclear medium that violate both time-reversal symmetry and parity. We have developed a cold-atom technique to study the spin precession of Ra-225 atoms held in an optical dipole trap, and demonstrated the principle of this method by completing the first measurement of its atomic electric dipole moment, reaching an upper limit of vertical bar d(Ra-225)vertical bar < 5.0 x 10(-22) e cm (95% confidence).

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Nuclear Physics
OSTI Identifier:
1392530
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 114; Journal Issue: 23; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

Citation Formats

Parker, R. H., Dietrich, M. R., Kalita, M. R., Lemke, N. D., Bailey, K. G., Bishof, M., Greene, J. P., Holt, R. J., Korsch, W., Lu, Z. -T., Mueller, P., O’Connor, T. P., and Singh, J. T. First Measurement of the Atomic Electric Dipole Moment of Ra225. United States: N. p., 2015. Web. doi:10.1103/PhysRevLett.114.233002.
Parker, R. H., Dietrich, M. R., Kalita, M. R., Lemke, N. D., Bailey, K. G., Bishof, M., Greene, J. P., Holt, R. J., Korsch, W., Lu, Z. -T., Mueller, P., O’Connor, T. P., & Singh, J. T. First Measurement of the Atomic Electric Dipole Moment of Ra225. United States. doi:10.1103/PhysRevLett.114.233002.
Parker, R. H., Dietrich, M. R., Kalita, M. R., Lemke, N. D., Bailey, K. G., Bishof, M., Greene, J. P., Holt, R. J., Korsch, W., Lu, Z. -T., Mueller, P., O’Connor, T. P., and Singh, J. T. Mon . "First Measurement of the Atomic Electric Dipole Moment of Ra225". United States. doi:10.1103/PhysRevLett.114.233002.
@article{osti_1392530,
title = {First Measurement of the Atomic Electric Dipole Moment of Ra225},
author = {Parker, R. H. and Dietrich, M. R. and Kalita, M. R. and Lemke, N. D. and Bailey, K. G. and Bishof, M. and Greene, J. P. and Holt, R. J. and Korsch, W. and Lu, Z. -T. and Mueller, P. and O’Connor, T. P. and Singh, J. T.},
abstractNote = {The radioactive radium-225 (Ra-225) atom is a favorable case to search for a permanent electric dipole moment. Because of its strong nuclear octupole deformation and large atomic mass, Ra-225 is particularly sensitive to interactions in the nuclear medium that violate both time-reversal symmetry and parity. We have developed a cold-atom technique to study the spin precession of Ra-225 atoms held in an optical dipole trap, and demonstrated the principle of this method by completing the first measurement of its atomic electric dipole moment, reaching an upper limit of vertical bar d(Ra-225)vertical bar < 5.0 x 10(-22) e cm (95% confidence).},
doi = {10.1103/PhysRevLett.114.233002},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 23,
volume = 114,
place = {United States},
year = {2015},
month = {6}
}

Works referenced in this record:

Search for time-reversal-symmetry violation in thallium fluoride using a jet source
journal, September 1991


Fully self-consistent calculations of nuclear Schiff moments
journal, July 2010


Nuclear Time-Reversal Violation and the Schiff Moment of Ra 225
journal, June 2005


Zeeman frequency shifts in an optical dipole trap used to search for an electric-dipole moment
journal, June 1999


Techniques used to search for a permanent electric dipole moment of the 199 Hg atom and the implications for CP violation
journal, January 2013


Order of Magnitude Smaller Limit on the Electric Dipole Moment of the Electron
journal, December 2013


Measurement of the lifetimes of the lowest P 1 3 state of neutral Ba and Ra
journal, January 2006


Improved Experimental Limit on the Electric Dipole Moment of the Neutron
journal, September 2006


Enhanced T -odd, P -odd electromagnetic moments in reflection asymmetric nuclei
journal, September 1997


Evidence for the 2 π Decay of the K 2 0 Meson
journal, July 1964


Electric dipole moments as probes of new physics
journal, July 2005


Laser Trapping of Ra 225 and Ra 226 with Repumping by Room-Temperature Blackbody Radiation
journal, February 2007


Nuclear theory and science of the facility for rare isotope beams
journal, April 2014


Electric dipole moments: A global analysis
journal, March 2015


Calculation of energy levels and transition amplitudes for barium and radium
journal, December 2006

  • Dzuba, V. A.; Flambaum, V. V.
  • Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 40, Issue 1
  • DOI: 10.1088/0953-4075/40/1/021

Measurability of Nuclear Electric Dipole Moments
journal, December 1963


Observation of Large CP Violation in the Neutral B Meson System
journal, August 2001


Electric dipole moments of nucleons, nuclei, and atoms: The Standard Model and beyond
journal, July 2013

  • Engel, Jonathan; Ramsey-Musolf, Michael J.; van Kolck, U.
  • Progress in Particle and Nuclear Physics, Vol. 71
  • DOI: 10.1016/j.ppnp.2013.03.003

Collective T - and P -Odd Electromagnetic Moments in Nuclei with Octupole Deformations
journal, June 1996


Observation of CP Violation in the B 0 Meson System
journal, August 2001


Electric dipole moments of Hg, Xe, Rn, Ra, Pu, and TlF induced by the nuclear Schiff moment and limits on time-reversal violating interactions
journal, July 2002


Coherent population transfer among quantum states of atoms and molecules
journal, July 1998


Improved Limit on the Permanent Electric Dipole Moment of Hg 199
journal, March 2009


On the Possibility of Electric Dipole Moments for Elementary Particles and Nuclei
journal, June 1950


Atomic Electric Dipole Moment Measurement Using Spin Exchange Pumped Masers of 129 Xe and 3 He
journal, January 2001