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Measurement of a false electric dipole moment signal from 199Hg atoms exposed to an inhomogeneous magnetic field

journal contribution
posted on 2023-06-08, 22:45 authored by S Afach, C A Baker, G Ban, G Bison, K Bodek, Z Chowdhuri, M Daum, M Fertl, B Franke, P Geltenbort, K Green, M G D van der Grinten, Z Grujic, Philip Harris, W Heil, V Hélaine, R Henneck, M Horras, P Iaydjiev, S N Ivanov, M Kasprzak, Y Kermaïdic, K Kirch, P Knowles, H-C Koch, S Komposch, A Kozela, J Krempel, B Lauss, T Lefort, Y Lemière, A Mtchedlishvili, O Naviliat-Cuncic, J M Pendlebury, F M Piegsa, G Pignol, P N Prashant, G Quéméner, D Rebreyend, D Ries, S Roccia, P Schmidt-Wellenburg, N Severijns, A Weis, E Wursten, G Wyszynski, J Zejma, J Zenner, G Zsigmond
We report on the measurement of a Larmor frequency shift proportional to the electric-field strength for 199Hg atoms contained in a volume permeated with aligned magnetic and electric fields. This shift arises from the interplay between the inevitable magnetic field gradients and the motional magnetic field. The proportionality to electric-field strength makes it apparently similar to an electric dipole moment (EDM) signal, although unlike an EDM this effect is P- and T-conserving. We have used a neutron magnetic resonance EDM spectrometer, featuring a mercury co-magnetometer and an array of external cesium magnetometers, to measure the shift as a function of the applied magnetic field gradient. Our results are in good agreement with theoretical expectations.

History

Publication status

  • Published

File Version

  • Published version

Journal

European Physical Journal D

ISSN

1434-6060

Publisher

EDP Sciences

Issue

10

Volume

69

Article number

a225

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2015-10-13

First Open Access (FOA) Date

2017-03-13

First Compliant Deposit (FCD) Date

2015-10-13

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