Single-color optical-selectivity calculations are carried out for a number of transitions in the 570–620-nm wavelength range by a spectral-simulation method. The computed isotope ratio-enhancement factors are in good agreement with the values reported [J. Opt. Soc. Am. B <b>5</b>, 2409–2416 (1988); Chem. Phys. Lett. <b>118</b>, 134–139 (1985)]. The study results in the identification of six first-step excitation transitions for the selective ionization of the <sup>91</sup>Zr isotope, for which the isotope ratio-enhancement factors are ∼10. The 4d<sup>2</sup>5s<sup>2</sup> <sup>3</sup>F<sub>4</sub> <sup>586.8268</sup> nm 4d<sup>2</sup>5s5p <sup>5</sup>F<sub>5</sub><sup>0</sup> transition is found to be most efficient for selective excitation of the <sup>91</sup>Zr isotope, whose isotope ratio-enhancement factor was nearly eight times greater than that of the previously reported transitions. The present calculations demonstrate the feasibility of selective excitation of the <sup>91</sup>Zr isotope, despite the utilization of broadband lasers and larger Doppler widths of the atomic system.
© 2002 Optical Society of America
(020.2930) Atomic and molecular physics : Hyperfine structure
(020.3260) Atomic and molecular physics : Isotope shifts
(020.3690) Atomic and molecular physics : Line shapes and shifts
(300.6360) Spectroscopy : Spectroscopy, laser
(350.3250) Other areas of optics : Isotope separation
Pragada V. Kiran Kumar, Manda Sankari, and Manda V. Suryanarayana, "Calculation of single-color optical selectivities of the 91Zr isotope for transitions in the 570–620-nm region," J. Opt. Soc. Am. B 19, 2833-2843 (2002)