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Rosner, S. D.; Pipkin, F. M.

doi:10.1103/physreva.1.571

Cited by 68 publications

(29 citation statements)

References 28 publications

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“…The collision process of two laser-cooled 3 He* atoms is controlled by the atomic hyperfine interaction [48] and the various interatomic interactions [38,40,41] that result in potentials (2S+1) V (R). As a result of the hyperfine interaction, S is not a good quantum number for large internuclear distances, where atom pairs are characterized by F .…”

Section: Fermionicmentioning

confidence: 99%

Homonuclear ionizing collisions of laser-cooled metastable helium atoms

et al. 2006

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We present a theoretical and experimental investigation of homonuclear ionizing collisions of lasercooled metastable (2 3 S1) helium atoms, considering both the fermionic 3 He and bosonic 4 He isotope. The theoretical description combines quantum threshold behavior, Wigner's spin-conservation rule and quantum statistical symmetry requirements in a single-channel model, complementing a more complete close-coupling theory that has been reported for collisions of metastable 4 He atoms. The model is supported with measurements (in the absence of light fields) of ionization rates in magnetooptically trapped samples, that contain about 3 × 10 8 atoms of a single isotope. The ionization rates are determined from measurements of trap loss due to light-assisted collisions combined with comparative measurements of the ion production rate in the absence and presence of trapping light. Theory and experiment show good agreement.

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Section: Fermionicmentioning

confidence: 99%

Homonuclear ionizing collisions of laser-cooled metastable helium atoms

et al. 2006

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“…(1), H (5) , essentially the nuclear structure contribution, requires input from the nuclear physics to be reliable evaluated. This is the reason we do not present final theoretical predictions for hfs, to compare with the precise measurement in [8] E hfs (He) = 6 739701.177(16) kHz .…”

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confidence: 90%

“…The numerical calculation of their matrix elements is still under way. In this work we study He 3 hyperfine splitting, which was measured very precisely by Rosner and Pipkin in [8]. He 3 hfs is a nice example of difficulties in the bound state QED and perturbative approaches.…”

mentioning

confidence: 93%

Hyperfine splitting of 2³S₁state in He³

Pachucki¹

2001

J. Phys. B: At. Mol. Opt. Phys.

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Relativistic corrections to the hyperfine splitting are calculated for the triplet 2 3 S 1 state of the helium isotope He 3 . High precision variational wave functions are employed, where the electron-electron correlations are well accounted for. Due to the unknown nuclear structure a comparison with the experimental result is performed via He 3+ hyperfine splitting. Surprisingly, the second order contribution due to Fermi interaction, in spite of the additional small factor m/M , is very significant. PACS numbers 31

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“…However, only in 3He is the mixing as simple in origin as in Li § All the other atoms experience additional core effects [12]. However in 3He, with a nuclear spin I = 1/2, this effect could not be extracted directly from the measurement [13], since it is hidden as a small contribution in a large two-level hfs splitting. Thus, it had to be included [3] as a 9 ppm correction in a theoretical fit of the total hfs energy splitting.…”

Section: Introductionmentioning

confidence: 94%

Triplet-singlet interaction in the 1s 2s3S1 hyperfine splitting of he-like Li+

et al. 1983

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The hyperfine structure (hfs) interaction between the metastable 2 3SI and 2 1S 0 states in 6, 7Li+ causes very small equal and opposite energy level shifts, c~, in the two levels having the same total angular momentum quantum number F=I. This amounts to 12 ppm with respect to the total hfs splitting of 30 GHz for the 7Li+ 2 3S 1 state and has been measured for the first time directly for the case of a core-free electronic system by combined laser-microwave spectroscopy. A new calculation of 6 with accurate integraltransform 2 1S o and 2 3S1 wave functions is reported. Configuration interactions and electron exchange and correlation effects, which differ for parallel (3S~) and antiparallel (1So) spins, are treated in detail in order to obtain very good agreement between measured and theoretical values for this tiny perturbation. A complete understanding of 3 is indispensable for extracting fundamental constants from two-electron spectroscopic data.

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Hyperfine Structure of the2S13State of

Cited by 68 publications

References 28 publications

Homonuclear ionizing collisions of laser-cooled metastable helium atoms

Homonuclear ionizing collisions of laser-cooled metastable helium atoms

Hyperfine splitting of 2³S₁state in He³

Triplet-singlet interaction in the 1s 2s3S1 hyperfine splitting of he-like Li+

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Hyperfine Structure of the2S13State of

Cited by 68 publications

References 28 publications

Homonuclear ionizing collisions of laser-cooled metastable helium atoms

Homonuclear ionizing collisions of laser-cooled metastable helium atoms

Hyperfine splitting of 23S1state in He3

Triplet-singlet interaction in the 1s 2s3S1 hyperfine splitting of he-like Li+

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Hyperfine splitting of 2³S₁state in He³