Laser-rf double-resonance hyperfine structure measurements of the metastable 3d 4s 1 D 2 state of43Ca

Aydin, R.; Ertmer, W.; Johann, Ulrich

doi:10.1007/bf01413399

Cited by 22 publications

(8 citation statements)

References 9 publications

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“…Second order corrections for the 4s4p 1P 1 state cannot explain the discrepancy as has been argued in [11]. Recently a nuclear quadrupole moment has also been obtained from the 3d4s 1D 2 hfs of 43Ca [15]. well within the experimental errors.…”

Section: Data Analysis and Discussionsupporting

confidence: 56%

Nuclear electric quadrupole moment of41Ca by laser-RF spectroscopy

et al. 1983

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The nuclear electric quadrupole moment of 41Ca, which contains a single neutron outside closed proton and neutron shells (N=Z=20) has been determined. For this purpose the hyperfine structure (hfs) of the metastable 4s4p 3P 1 state was measured by a highly sensitive technique of combined radiofrequency laser saturation spectroscopy. Because of the small size of the quadrupole interaction constant B corrections for second order effects had to be included in the analysis. Based on corrected hfs constants for the 4s4p 3p~ state of the isotopes 41'43'45Ca and on a recent ab initio calculation of (r -3) integrals [1] one obtains in a consistent way: Q(41Ca)= -80(8) mb Q(43Ca)= -49(5) mb [1] Q(45Ca) = + 46(14) mb.These values include corrections for the electronic core polarization and relativistic effects. Moreover, the hfs anomaly in the 3p~ state was derived from the corrected Afactors and the nuclear magnetic moments of 41'43Ca. The value is 41A43= -1.16(39). 10 -4.

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Section: Data Analysis and Discussionsupporting

confidence: 56%

Nuclear electric quadrupole moment of41Ca by laser-RF spectroscopy

et al. 1983

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“…The lowest order spin-spin interaction discussed in [9J reduces this value to 7/]/6=-0.0056. Assuming the spin-orbit parameters to have the same value leads to 7/1/6=-0.0049 used by Aydin et al [1][2][3][4][5]. We use here the mean value 7/1/6=-0.0056 (7).…”

Section: The 4s 3d Configurationmentioning

confidence: 95%

“…Such measurements have been performed in the 4s4p configuration, by Grundevik et al on the 3P 2 state [3] and by Arnold et al on the 3P 1 state [4]. The metastable 4s 3d 1D 2 state has been studied by Aydin et al [5]. Another metastable state available is 3d in Ca +.…”

Section: Introductionmentioning

confidence: 97%

Ab-initio calculations of pair-correlation effects on the hyperfine structure of the 4s 4p and 4s 3d configurations of Ca

Salomonson

1984

Z Physik A

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The hyperfine structure of the 4s4p and 4s 3d configurations of Ca has been evaluated using many-body perturbation theory. Single excitations and pair-correlation effects have been included by solving coupled one-particle and two-particle differential equations numerically. The correlation between the valence electrons has been treated selfconsistently by solving these equations iteratively for the valence pair. Core-polarisation effects have been evaluated by hyperfine-induced single-particle functions. From the calculated and experimental results of the two configurations, Q---49(5)mb has been evaluated for the nuclear quadrupole moment of 43Ca.

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“…Thus the hfs is known for all states of the 4s4p configuration. Very recently accurate hfs data have been available also for the metastable 4s 3d 1D 2 state [6]. In the present paper the experimental results for the 4s4p configuration have been used to test the importance of configuration interaction and to eval-uate a more accurate value of the nuclear quadrupole moment of 43Ca than given earlier I-4, 5].…”

Section: Introductionmentioning

confidence: 93%

Analysis of the hyperfine structure of the 4s 4p configuration in Ca and the nuclear quadrupole moment of43Ca

Olsson

Salomonson

1982

Z Physik A

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Hyperfine structure (r -3) integrals are calculated for the 4s4p configuration in Ca, including the effects of core polarization. This is done with the use of LS-dependent Hartree-Fock orbitals. The calculated effects describe well the magnetic hyperfine structure for the 3p term. The description of the 1p term is less good, however, due to the effects of the strong correlation between the valence electrons for this term. The intermediate coupling in the lowest sp configurations of Mg, Ca and Sr is analysed considering also the spin-spin interaction. Using the ab initio (r -3) integrals, the determined intermediate coupling and the experimentally known hyperfine constants, second-order hyperfine corrections are calculated and accurate a q-and biLparameters evaluated for 43Ca. This resolves the previously inconsistent results for b ~ determined from the 3P 1 and 3P a b-factors for this isotope. An accurate value for b ~ in the 3p term of 43Ca is b~ -13.27(6) MHz. Combined with the calculated (r-3) ~ integral, this gives a more accurate value for the nuclear quadrupole moment of 43Ca than given earlier, Q(43Ca)=-49(5) mb, where the uncertainty comes from the uncertainty estimated for the (r-3) ~ integral.

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Laser-rf double-resonance hyperfine structure measurements of the metastable 3d 4s 1 D 2 state of43Ca

Cited by 22 publications

References 9 publications

Nuclear electric quadrupole moment of41Ca by laser-RF spectroscopy

Nuclear electric quadrupole moment of41Ca by laser-RF spectroscopy

Ab-initio calculations of pair-correlation effects on the hyperfine structure of the 4s 4p and 4s 3d configurations of Ca

Analysis of the hyperfine structure of the 4s 4p configuration in Ca and the nuclear quadrupole moment of43Ca

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