Measurements of Hyperfine Structure and Isotope Shift of High-Lying Levels of Gd I by Laser Induced Fluorescence Spectroscopy.

Aly, Naglaa E.; Koh, Kuniyasu; Nomaru, Keiji; Niki, Hideaki; Izawa, Yasukazu; Nakai, S.

doi:10.2184/lsj.22.183

Cited by 7 publications

(3 citation statements)

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“…We have carried out so far basic research on laser Gd isotope separation. [1][2][3][4][5][6][7][8][9][10] The absorption spectra of Gd were measured using yellow-red dye lasers with a high resolution, and the isotope shifts and hyperfine structures were analyzed. 1,2,11,12) An absorption spectrum of Gd showed a complex structure because two odd isotopes have hyperfine structures.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10] The absorption spectra of Gd were measured using yellow-red dye lasers with a high resolution, and the isotope shifts and hyperfine structures were analyzed. 1,2,11,12) An absorption spectrum of Gd showed a complex structure because two odd isotopes have hyperfine structures. The hyperfine splitting spectral width varied much (0.15-2.4 GHz) depending on the transition.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of Hyperfine Structure and Isotope Shift of Transitions in Gadolinium Using Blue Diode Laser

Niki¹,

Tomoya

Tokita

et al. 2005

Jpn. J. Appl. Phys.

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Laser-induced fluorescence spectroscopy using a single-longitudinal-mode diode laser has been applied to investigating isotope shifts and the hyperfine structures of gadolinium in the wavelength region of 400 nm. Six absorption spectra of transitions from the ground and low-lying metastable levels were measured. The isotope shift per unit mass change varied from 0.6 to 1.0 GHz depending on the transition. The hyperfine splitting constants of 157Gd and 155Gd isotopes were determined for the six upper levels of the transitions. The absorption spectrum of the 999–25661 cm-1 transition showed the narrowest spectral width for odd isotopes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Measurement of Hyperfine Structure and Isotope Shift of Transitions in Gadolinium Using Blue Diode Laser

Niki¹,

Tomoya

Tokita

et al. 2005

Jpn. J. Appl. Phys.

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“…According to the measured spectral data 2,3) the Á 1 's were set to 200 and 280 MHz for the three-step and the two-step photoionization of 156 Gd, respectively. From the absorption measurements for the second excitation step, 9) the isotope shifts were twice or more larger than those for the first excitation step. And the hyperfine spread of 157 Gd was larger than the isotope shift in every spectrum.…”

Section: Isotopic Selectivity and Ionization Efficiency In Separamentioning

confidence: 96%

Selectivity and Efficiency of Laser Isotope Separation Processes of Gadolinium

Niki

Kazunori

Masateru

et al. 2006

Journal of Nuclear Science and Technology

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Isotopic selectivity and ionization efficiency are discussed in the isotope separation processes of Gd based on polarization selection rules and based on isotope shift. Enrichment of 157 Gd to 90% was experimentally demonstrated using both methods together. The features of the absorption spectra of Gd in yellow-red and blue regions were summarized. Absorption spectra that are suitable for separation process using isotope shift were examined and an obtainable selectivity and efficiency are quantitatively calculated.

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