"Anticrossing" Signals in Resonance Fluorescence

Wieder, H.; Eck, T. G.

doi:10.1103/physrev.153.103

Cited by 119 publications

(25 citation statements)

References 14 publications

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“…Therefore the hfs of the 22p state of atomic lithium has been the subject of numerous theoretical treatments [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] [20]. The same experiments have been performed on 6Li [19,1,20] yielding a (more reliable) average anticrossing matrix element Vav(6Li) = 6.783 (69)MHz. Assuming that the coupling constants can be scaled by the precisely known nuclear g-factors, the anticrossing matrix element of 6Li was used for a complete and unrestricted analysis of the three magnetic hfs constants in the 2 2p term of 7Li [21].…”

Section: Magnetic Hyperfine Structurementioning

confidence: 93%

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Fine and hyperfine structure of the 22 P term of7Li; determination of the nuclear quadrupole moment

1975

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Abstract. Microwave transitions between the Zeeman split doublet states 22P1/2 and 22P3/2 of 7El have been measured using the optical double resonance method. The fine structure separation was determined to be vfs= 10.053.184(58) MHz. The hyperfine structure was well resolved and led to considerably improved precision of the diagonal coupling constants al/2 =45.914(25) MHz, a3/2 = -3.055(14) M Hz, b = -0.22l(29) MHz. Furthermore, the contact, spin dipolar and orbital magnetic hyperfine constants are evaluated using additional results from level crossing experiments, which are more sensitive on the nondiagonal magnetic hyperfine constant a3/2, 1/2. The results are in good agreement with recent theoretical calculations. The nuclear quadrupole moment is derived from b to be Q(VLi) = -41(6) mbarn.

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Section: Magnetic Hyperfine Structurementioning

confidence: 93%

“…The evaluation in the original papers [19,1] was still confined to two independent hfs parameters. Only when the ALC experiment [20,10] was publisheda third independent information on the magnetic hfssufficient data were at hand for a sensitive three parameter fit. In consequence Lyons and Das reanalysed the experimental results.…”

Section: Magnetic Hfs Constantsmentioning

confidence: 99%

Fine and hyperfine structure of the 22 P term of7Li; determination of the nuclear quadrupole moment

1975

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“…In case of the lithium atom this model has to be strongly modified since a magnetic field strength higher than a few mT is strong enough to destroy the coupling between the angular momenta L and S. The completely decoupled base I L S I M L M s M x ) was therefore used for calculating the matrix elements of the interaction Hamiltonian, diagonal in L, S and L A detailed description of the Hamiltonian and its matrix elements is given in [5][6][7]. The hyperfine interaction Hamiltonian contains four hyperfine constants a~, a a, a o and b as parameters for the contact, the orbital, the spin dipolar and the quadrupol term.…”

Section: Theoretical Descriptionmentioning

confidence: 99%

“…In the case of the sodium atom the Zeeman-splittings of the D~ and D 2 line can be calculated independently from each other, since the fine structure splitting is so large that in a first approximation only hyperfine and Zeeman interactions which are diagonal in J are taken into account. The repulsion between the states M : = + 1 / 2 and -1 / 2 belonging to the 32P~/2 and 3 2P3/2 levels, caused by the nondiagonal part of the Zeeman interaction, can be described using a second order correction term, quadratic in the magnetic field strength B [ 1-41. For the lithium atom the whole perturbation matrix containing the diagonal and nondiagonal hyperfine and Zeeman interactions of both fs levels has to be diagonalized [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Investigations of the sodium and lithium D-lines in strong magnetic fields

Umfer

Windholz

Musso

1992

Z Phys D - Atoms, Molecules and Clusters

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Abstract. Experimental and theoretical investigations of the splitting of the hyperfme structure of the sodium and lithium-D-lines in magnetic fields between 0 and 1 T were performed. In this magnetic field region the fine structure levels J = t/2 and J = 3/2 of the excited term 2p begin to influence each other. In case of lithium crossings and anticrossings of hyperfine states stemming from different fine structure energy levels J = 1/2 and J = 3 / 2 can be observed. The measurements were performed by laseratomic-beam spectroscopy in dependence on the applied external magnetic field strength. The experimental spectra were compared with computed spectra. Spectra were simulated by calculations using for the hyperfine hamiltonian two hyperfine constants A and B in case of sodium and four hyperfine constants ac, ae, a0 and b in case of lithium. Values for this constants could be derived by fitting the theoretical splittings to the experimental ones. For the first time the gi -factor of sodium could be determined in a purely optical way.

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“…It is necessary to have a highresolution spectroscopic method, as the splittings in lithium are small. The level-crossing method, which gives an accuracy, in principle only limited by the finite radiation width of the levels, has been applied for measurements of fine-and hyperfine structure in the lowest P-states [1][2][3]. The fine-structure intervals are slightly lower than the hydrogenic values.…”

Section: Introductionmentioning

confidence: 99%