J dependences of the isotope shifts in Ti I 3d²4s²a³P and 3d³4p y³D^oterms

Abstract

Atomic beam laser spectroscopy was used to measure the isotope shifts (IS) and hyperfine structures of all stable titanium isotopes in eight Ti I spectral lines. Six of the lines investigated cover all allowed transitions between the lower 3d24s2 a 3P and the upper 3d34p y 3Do terms; two of them are between the 3d24s2 a 3P1,2 and 3d24s4p z 3P2o levels. J-dependences of the IS in the a 3P and y 3Do terms were established. The contributions of the field and mass shifts to the J-dependence were separated using model-independent data on muonic atom IS and electronic scattering experiments. Evidence for mass shift domination of the J-dependence was provided.

The elemental composition of the Sun

“…In cases of overlap, the ABMR data of Aydin et al have smaller uncertainties than those of Johann et al (1981), whereas the LFS data of Gangrsky et al is preferable to Aydin et al's LFS. LFS data from Jin et al (2009) is of similar quality to, and agrees well with, that of Gangrsky et al (1995). The only HFS data on Ti  are the experimental ABMR and corresponding theoretical values produced by Berrah-Mansour et al (1992), and the LFS data of Nouri et al (2010).…”

“…We therefore use the experimental values for the relevant isotope where available, but use rescaled experimental data from the other where it does not exist for both isotopes. Data on hyperfine structure for the Ti  lines for which we have isotopic information are best obtained from Gangrsky et al (1995) and Aydin et al (1990). In cases of overlap, the ABMR data of Aydin et al have smaller uncertainties than those of Johann et al (1981), whereas the LFS data of Gangrsky et al is preferable to Aydin et al's LFS.…”

“…The data we use come from laser fluorescence spectroscopy (LFS, also known simply as laser-induced fluorescence, LIF; Gangrsky et al 1995). We prefer the data of Gangrsky et al over the less accurate work of Cruz et al (1994) and previous results from the same group (Anastassov et al 1994).…”

“…It has been consistently found that the hyperfine A constants for 47 Ti and 49 Ti are essentially equal, and B(47)/B(49) ≈ 1.22, for all levels (Channappa & Pendlebury 1965;Aydin et al 1990;Stachowska et al 1994;Gangrsky et al 1995). We therefore use the experimental values for the relevant isotope where available, but use rescaled experimental data from the other where it does not exist for both isotopes.…”

Isotope shift in titanium atom

“…However, it is only recently that some results have been published [3][4][5][6][7]. Two of the articles mentioned, by Anastassov et al [5] and Gangrsky et al [7], contain new results for the changes of nuclear mean square charge radii, extracted from the optical data.…”