Measurement method for the nuclear anapole moment of laser-trapped alkali-metal atoms

Gomez, E.; Aubin, S.; Sprouse, Gene D.; Orozco, L. A.; DeMille, David

doi:10.1103/physreva.75.033418

Cited by 61 publications

(83 citation statements)

References 37 publications

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“…Our future work, the search of anapole moment in alkali atoms [30], relies on high precision atomic structure calculations to extract the fundamental information from the measurement. We hope the advance on the experimental value of the lifetime will contribute to new improvements on the precision of theoretical calculations.…”

Section: Discussionmentioning

confidence: 99%

Lifetime measurements of the5dstates of rubidium

2008

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We present lifetime measurements of the 5D 3/2 and 5D 5/2 states of rubidium using the time correlated single photon counting method. We perform the experiment in a magneto-optical trap of 87 Rb atoms using a two-step excitation with the trap laser at 780 nm as the first step. We record the 761.9 nm fluorescence from the decay of the 5D 3/2 state to the 5P 1/2 state, and measure the lifetime of the 5D 3/2 state τ = 246.3(1.6) ns. We record the 420.2 nm fluorescence from the cascade decay of the 5D 5/2 state to the 5S 1/2 state through the 6P 3/2 state, and extract the lifetime of the 5D 5/2 state τ = 238.5(2.3) ns.

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Section: Discussionmentioning

confidence: 99%

Lifetime measurements of the5dstates of rubidium

2008

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“…Therefore, the properties of this system are expected to exhibit moderately strong correlation effects, and their determination calls for using powerful many-body methods. Like other alkali atoms, Fr atom is also being considered for many important experimental studies, prominent among them being the measurement of the electric dipole moment (EDM) due to parity and time reversal symmetries [1,2] and parity nonconservation (PNC) effects due to neutral weak interaction [2,3] and the nuclear anapole moment [4] owing to its relatively heavy size. Like the EDM and PNC interactions, the magnetic dipole hyperfine interaction has a fairly strong dependence on Z, the atomic number of the system [5] as it involves an electron interacting with the nucleus.…”

Section: Introductionmentioning

confidence: 99%

Correlation trends in the hyperfine structures ofFr210,212

et al. 2015

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We demonstrate the importance of electron correlation effects in the hyperfine structure constants of many low-lying states in 210 Fr and 212 Fr. This is achieved by calculating the magnetic dipole and electric quadrupole hyperfine structure constants using the Dirac-Fock approximation, second order many-body perturbation theory and the coupled-cluster method in the singles and doubles approximation in the relativistic framework. By combining our recommended theoretical results with the corresponding experimental values, improved nuclear magnetic dipole and electric quadrupole moments of the above isotopes are determined. In the present work, it is observed that there are large discrepancies between the hyperfine structure constants of the 7D 5/2 state obtained from the experimental and theoretical studies whereas good agreements are found for the other D 5/2 states. Our estimated hyperfine constants for the 8P , 6D, 10S and 11S states could be very useful as benchmarks for the measurement of these quantities.

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“…This combines with the spin-dependent part of the electron-nucleon parity nonconserving interaction. This results in a hyperfine dependence which has been measured for Cs [20], and experiments are underway for other systems, including Fr [21].…”

Section: Introductionmentioning

confidence: 98%

Atoms through the looking glass – a relativistic challenge

Pendrill¹

2008

Can. J. Phys.

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Abstract:The search for weak-interaction induced atomic parity non-conservation, initiated in the 70s, challenges both theory and experiment. Since the weak interaction is very short-range, the atomic effects increase rapidly with nuclear charge, as ¢ ¡. The focus has thus been on heavy atoms, where relativistic effects are essential, and nuclear size must be taken into account. The generalization of atomic many-body methods to relativistic systems involved both computational and formal difficulties, incorporating methods developed in quantum electrodynamics. Twenty years ago, the ability was emerging to treat atomic pair correlation in a relativistic framework. The application to many-electron systems opened for comparison with many atomic properties, such as isotope shifts, hyperfine structure and hyperfine anomalies, which reflect nuclear properties. In addition, the search for simultaneous violation of both parity and time reversal symmetry involves different types of effects, including nuclear "Schiff moments". Comparison between computed and experimental results for highly charged hydrogen-like systems provides a test of the theoretical and numerical treatment of the electron-nucleus interaction and of the description of nuclear distributions.

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Measurement method for the nuclear anapole moment of laser-trapped alkali-metal atoms

Cited by 61 publications

References 37 publications

Lifetime measurements of the5dstates of rubidium

Lifetime measurements of the5dstates of rubidium

Correlation trends in the hyperfine structures ofFr210,212

Atoms through the looking glass – a relativistic challenge

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