Measurement of linear stark interference in Hg199

T. H. Loftus; M. D. Swallows; W. C. Griffith; M. V. Romalis; B. R. Heckel; E. N. Fortson

doi:10.1103/PhysRevLett.106.253002

Measurement of linear stark interference in Hg199

T. H. Loftus, M. D. Swallows, W. C. Griffith, M. V. Romalis, B. R. Heckel, E. N. Fortson

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Abstract

We present measurements of Stark interference in the 6S01→6P13 transition in Hg199, a process whereby a static electric field E mixes magnetic dipole and electric quadrupole couplings into an electric dipole transition, leading to E-linear energy shifts similar to those produced by a permanent atomic electric dipole moment (EDM). The measured interference amplitude, a _SI=(a_M1+a_E2)=(5.8±1.5)×10 ^-9(kV/cm)^-1, agrees with relativistic, many-body predictions and confirms that earlier central-field estimates are a factor of 10 too large. More importantly, this study validates the capability of the Hg199 EDM search apparatus to resolve nontrivial, controlled, and sub-nHz Larmor frequency shifts with EDM-like characteristics.

Original language	English (US)
Article number	253002
Journal	Physical review letters
Volume	106
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.106.253002
State	Published - Jun 24 2011

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.106.253002

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title = "Measurement of linear stark interference in Hg199",

abstract = "We present measurements of Stark interference in the 6S01→6P13 transition in Hg199, a process whereby a static electric field E mixes magnetic dipole and electric quadrupole couplings into an electric dipole transition, leading to E-linear energy shifts similar to those produced by a permanent atomic electric dipole moment (EDM). The measured interference amplitude, a SI=(aM1+aE2)=(5.8±1.5)×10 -9(kV/cm)-1, agrees with relativistic, many-body predictions and confirms that earlier central-field estimates are a factor of 10 too large. More importantly, this study validates the capability of the Hg199 EDM search apparatus to resolve nontrivial, controlled, and sub-nHz Larmor frequency shifts with EDM-like characteristics.",

author = "Loftus, {T. H.} and Swallows, {M. D.} and Griffith, {W. C.} and Romalis, {M. V.} and Heckel, {B. R.} and Fortson, {E. N.}",

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T1 - Measurement of linear stark interference in Hg199

AU - Loftus, T. H.

AU - Swallows, M. D.

AU - Griffith, W. C.

AU - Romalis, M. V.

AU - Heckel, B. R.

AU - Fortson, E. N.

PY - 2011/6/24

Y1 - 2011/6/24

N2 - We present measurements of Stark interference in the 6S01→6P13 transition in Hg199, a process whereby a static electric field E mixes magnetic dipole and electric quadrupole couplings into an electric dipole transition, leading to E-linear energy shifts similar to those produced by a permanent atomic electric dipole moment (EDM). The measured interference amplitude, a SI=(aM1+aE2)=(5.8±1.5)×10 -9(kV/cm)-1, agrees with relativistic, many-body predictions and confirms that earlier central-field estimates are a factor of 10 too large. More importantly, this study validates the capability of the Hg199 EDM search apparatus to resolve nontrivial, controlled, and sub-nHz Larmor frequency shifts with EDM-like characteristics.

AB - We present measurements of Stark interference in the 6S01→6P13 transition in Hg199, a process whereby a static electric field E mixes magnetic dipole and electric quadrupole couplings into an electric dipole transition, leading to E-linear energy shifts similar to those produced by a permanent atomic electric dipole moment (EDM). The measured interference amplitude, a SI=(aM1+aE2)=(5.8±1.5)×10 -9(kV/cm)-1, agrees with relativistic, many-body predictions and confirms that earlier central-field estimates are a factor of 10 too large. More importantly, this study validates the capability of the Hg199 EDM search apparatus to resolve nontrivial, controlled, and sub-nHz Larmor frequency shifts with EDM-like characteristics.

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Measurement of linear stark interference in Hg199

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