Studies on the hyperfine structure of La I in a hollow-cathode discharge tube

Caiyan, Luo; Qu, Jianan; Zhu, Lei; Lin, Fang

doi:10.1088/0022-3727/23/10/011

Cited by 19 publications

(16 citation statements)

References 4 publications

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“…2) our value of the A constant differs from the one given in [22] by less than 10%; this difference exceeds, however, the error limits.…”

Section: Results Of the Measurements And Discussioncontrasting

confidence: 57%

“…The first column contains the wavelengths of all the investigated optical transitions, which served to determine the hyperfine splitting constants of the electronic levels of lanthanum atom, belonging to the odd configurationS (upper levels). Since not all of the transitions are mentioned in the tables of spectral lines of lanthanum atom [29,30] -a combination of a spectrograph and a Fabry-Perot interferometer [10], -Fourier spectroscopy [11], -laser optogalvanic spectroscopy (in the standard version and various modifications) [20][21][22][23].…”

Section: Results Of the Measurements And Discussionmentioning

confidence: 99%

“…-level-crossing spectroscopy (Hese [15]), -laser-induced fluorescence on an atomic beam (Childs and Goodman [16,17], Childs and Nielsen [14]), -laser spectroscopy on an atomic beam with the detection via two-photon ionization (Shaw et al [18]), -laser optogalvanic spectroscopy (Behrens and Guthöhrlein [19], Govindarajan and Pramila [20], Pramila [21], Caiyan et al [22] and Jia et al [23]), -laser Doppler-free two-photon spectroscopy in a hollow cathode (Jia et al [24]). …”

Section: Introductionmentioning

confidence: 99%

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Studies of Hyperfine Structure of LaI by Laser Spectroscopy on Atomic Beam

et al. 1996

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High-resolution Doppler-reduced laser spectroscopic investigations on an atomic beam of 139 La were carried out to study hyperfine structure of 8 odd levels. The magnetic-dipole coupling constants A and the electric-quadrupole coupling constants B were determined and compared with the data from literature, if available.PACS numbers: 35.10.Fk IntroductionThe first works concerning the electronic (fine and hyperfine) strncture of lanthanum atom were conducted already in the twenties and thirties of this century.Meggers [1] in 1932 performed first measurements of a large number of spectral lines of lanthanum atom; on the basis of those measurements Russell and Meggers [2] carried out identification of many electronic levels, mostly belonging to the low-lying configurations; this identification has in most cases been confirmed in later works.The first theoretical works, concerning the even configurations, were conducted by Stein [3]. The assignment of the theoretically determined electronic levels to the measured ones, for the even configurations, was performed by Wilson [4] and Ben Ahmed et al. [5,6], who used the least squares method.Anderson [7] was in 1934 the first to investigate the hyperfine stucture of the isotope 139 of lanthanum atom, using a combination of a spectrograph and a Fabry-Perot interferometer. The continuation of those measurements were the works of Murakawa and Kamei [8], Luhrs [9] and Fischer et al. [10], while Ben Ahmed [11] used Fourier spectroscopy. All of those investigations, performed by means of the classical optical spectroscopy, were of a rather limited accuracy.The first precise measurements of the hyperfine structure of the levels belonging to the ground term were performed by Ting in 1957 [12] with the use of the atomic beam magnetic resonance (ABMR) method. The magnetic-dipole (A), electric-quadupole (B) and magnetic-octupole (C) hyperfine splitting constants were obtained.

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“…2) our value of the A constant differs from the one given in [22] by less than 10%; this difference exceeds, however, the error limits.…”

Section: Results Of the Measurements And Discussioncontrasting

confidence: 57%

Section: Results Of the Measurements And Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Studies of Hyperfine Structure of LaI by Laser Spectroscopy on Atomic Beam

et al. 1996

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“…139 La has nuclear spin of 7/2, magnetic dipole moment of µ I = 2.783 045 5 (9)µ N and a electric quadrupole moment of Q = 0.20(1) b [1].…”

Section: Introductionmentioning

confidence: 99%

“…The hyperfine structure of La I has been investigated in the past by different experimental techniques and theoretical methods (atomic-beam magnetic resonance method, the laser-rf double-resonance and laser induced-fluorescence spectroscopy with atomic-beam, Doppler-free intermodulated fluorescence, Doppler--limited laser-induced fluorescence and optogalvanic spectroscopy, diode-laser-initiated resonance-ionization and mass-spectrometric detection, optical interference spectroscopy, the method of laser induced fluorescence in a hollow cathode discharge, and multiconfiguration Dirac-Fock (MCDF) ab initio calculations) [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

The Hyperfine Structure Calculations οf Some Excited Levels for¹³⁹La I

Karaçoban

Özdemir

2009

Acta Phys. Pol. A

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We calculated hyperfine structure constants of the 5d6s 2 , 5d 2 6s, 5d 3 , 5d 2 7s, 5d6s7s, 5d6p 2 , 4f 2 5d, 4f 6s6p, 5d6s6p, 5d 2 6p, 4f 5d6s and 4f 5d 2 levels for 139 La I (Z = 57). The calculations are based upon the multiconfiguration Hartree-Fock method within the framework of the Breit-Pauli relativistic corrections. Moreover, the results obtained were compared with other available calculations and experiments.

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