Selective Photoionization Scheme for Atomic Gadolinium Laser Isotope Separation

Naglaa El Sayed ALY; Keiji NOMARU; Yen Wei CHEN; Hideaki NIKI; Yasukazu IZAWA; Sadao NAKAI

doi:10.2184/lsj.22.108

Naglaa El Sayed ALY, Keiji NOMARU, Yen Wei CHEN, Hideaki NIKI, Yasukazu IZAWA, Sadao NAKAI

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Keywords: Laser isotope separation, Gd enrichment, Lambda configuration, Two-photon resonance, Population trapping.

JOURNAL FREE ACCESS

1994 Volume 22 Issue 2 Pages 108-115

DOI https://doi.org/10.2184/lsj.22.108

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Abstract

The selective photoionization scheme for separating ¹⁵⁷Gd from natural gadolinium and the laser irradiation conditions in order to enrich ¹⁵⁷Gd to 60-80% are discussed in the case of twoand three-step photoionization. The dependence of excitation pathways on J-values is also discussed. From the view point of ionization rate it is preferable to select the four-colour threestep photoionization scheme by using both the ground and the lowest metastable levels. Optimum laser irradiation conditions for gadolinium isotope separation are presented.

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