Optical Isotope Shifts in Ba II Even Isotopes with Lamb-dip Technique

Abstract

Isotope shifts of the 2D5/2,3/2-2P3/2 transitions in Ba II even isotopes have been measured by means of Lamb-dip spectroscopy. The obtained values are:Δν138-136 = -94 ± 4 MHz; Δν138-134 = -192 ± 7 MHzfor λ = 614 nmΔν138-136 = -101 ± 8 MHz; Δν138-134 = -195 ± 9 MHzfor λ = 585 nm.The nuclear volume effect for these isotopes seems to be negligible.

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

“…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 magnitude of this contact term does not depend on J, its value can be estimated by combining relations (1) and (2). This leads to a c = -62 MHz for the D-levels, while the contact term for the P-levels is negligibly small.…”

“…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]. However, the results common to both experiments completely disagree.…”

Isotope Shift and Hyperfine Structure Measurements in Xe II in a Laser-Ion Beam Experiment

“…However, King plots [3] using their values indicate rather large errors in some of the measured isotope shifts. In a recent paper [4] we introduced the saturated absorption (Lamb-dip) technique in a crossed laser-ion beam geometry to measure isotope shifts in free Ba 11 ions. This technique offers an independent means t o remeasure the Xe 11 isotope shifts.…”

Effects of Etching Gases and Bias Frequency on Notching and Charging in High-Density Plasma

“…Optical isotope shifts of both stable and unstable Ba isotopes have been studied extensively over the last few years by high-resolution spectroscopy using tunable dye lasers (Hohle et a1 1978, Alvarez et al 1978, Bekk et a1 1979, Baird et a1 1979, Silverans et a1 1980, Neugart et a1 1981. We have remeasured the isotope shifts in the Ba 11 5d 2D3/2,5/2 + 6p 2P3/2 transitions with an accuracy improved by more than one order of magnitude in order to reveal a possible J dependence in the metastable 5d 2D3/2,5/2 doublet.…”