High resolution spectroscopy of the transition 5d2D3/2?6p2P 3 2/0 in a fast Ba+ ion beam

Collinear fast beam-laser spectroscopy on 5d 2 D 3/2, 5/2 barium ions

“…The hyperfine structure constants, resulting from least squares fits through the data points are summarized in Table 3 together with the previously obtained hyperfine structure constants for the 2P3/z and the 203/2 levels. Our results for the 2P3/2 level are in agreement with those obtained with the quantumbeat method [6], and the h.f.s, constants for the 203/2 level agree with those of [1].…”

“…3 from which the oddeven staggering effect can clearly be seen (full lines A King plot of our results combined with the isotope shifts for the 6p2P1/2--+6s2St/2 resonance line measured by classical optical spectroscopy [1][2][3][4] shows the internal consistency of our isotope shifts (Fig. 4).…”

“…As the systematic error on the isotope shifts reported in [1] does not influence the slope of the King plot (5d-~ 6p versus 6p~6s) but only the extracted specific mass shift, the agreement of the calculated value A I ~'(0)125d ~ 6p = _ 0.23…”

“…Partial information for the metastable 203/2 and 2D5/2 barium ions has been obtained so far by two different techniques. Hyperfine structure constants and isotope shifts for 134Ba up to i 3 SBa for the 5d2D3/2--+6p2P3/2 transition were reported from a collinear fast beam-laser experiment [1]. The isotope shifts for the even Ba (M=134, 136 and 138) isotopes were measured in a crossed fast beam-laser experiment with Lamb dip technique on the 5d2D3/2,5/2-+6p2P3/2 transitions [2].…”

Measurements of the hyperfine structure constants of all the 5d 2 and 5d6s levels in139La II using the high-resolution spectroscopy on collinear laser-ion-beams

“…The fact that there are many elements with metastable ionic states from which light can be absorbed makes this experimental method widely applicable. It has been introduced by Meier et al [6,7]. Its main advantage is that, in contrast to an atomic beam, an ionic beam is much easier to handle experimentally.…”