Studies on the isotope selective photoionization of the low-abundant isotope

Abstract

The efficiency of the two photoionization schemes scheme 1: 4f 14 6s 2 1 S 0 (0 cm −1 ) 555.648 nm −→ 4f 14 6s6p 3 P o 1 (17 992.007 cm −1 ) 581.027 nm −→ 4f 13 6s 2 6p( 7 2 , 3 2 ) 2 (35 196.98 cm −1 ) 582.79 nm −→ autoionization state (52 353 cm −1 ) → Yb + and scheme 2: 4f 14 6s 2 1 S 0 (0 cm −1 ) 398.8 nm −→ 4f 14 6s6p 1 P o 1 (25 068.222 cm −1 ) <394 nm−→ Yb + has been studied by a spectral simulation approach for the isotope-selective excitation of the 168 Yb isotope. Isotopic selectivities have been computed for 4f 14 6s 2 1 S 0 -4f 14 6s6p 3 P o 1 (555.648 nm), 3 P o 1 -( 7 2 , 3 2 ) 2 (581.027 nm) and 4f 14 6s 2 1 S 0 -4f 14 6s6p 1 P o 1 (398.8 nm) transitions for various laser bandwidths of the excitation lasers. The degree of enrichment of the lowabundant 168 Yb isotope has been computed using the obtained isotopic selectivity values. Results obtained for scheme 1 are in good agreement with the results reported earlier. The abundance of 168 Yb isotope has been computed for various laser linewidths of the excitation laser and Doppler widths for scheme 2. Comparison of the two photoionization schemes for isotope-selective photoionization of the 168 Yb isotope has been made. The present computational method has been examined for computation of degree of enrichment for the photoionization schemes under consideration.

Stable Isotope Production of168Yb and176Yb for Industrial and Medical Applications

“…8) Up to now, this scheme has been known as the most efficient ionization route to separate 168 Yb and 176 Yb isotopes. 9) The isotope shifts between 168 Yb and other neighboring isotopes in the first and the second transitions are also shown in this figure. The most influential isotope for 168 Yb is found to be 171 Yb.…”

Resonance-enhanced isotope-selective photoionization of YbI for ion trap loading

“…2, a second light-field with wavelength below 394 nm is required to reach the continuum. This process has been proposed by Sankari et al [34]. Fortunately, this second light-field is easily supplied by the cooling laser for the YbII ion near 369 nm which is already present at experiments working with trapped YbII.…”

Optical selectivity calculation of calcium isotopes in a double-resonance ionization scheme

“…The modified abundances (as a result of selectivity in the first excitation step) are used for the calculation of selectivities for the second excitation step. The details of the optical selectivity calculations for single-and multi-step excitation schemes can also be found elsewhere [18][19][20][21]. Selectivities have been computed for the first-and second-step excitation of calcium isotopes.…”