Pressure broadening and line shifting of atomic strontium5s2S01→5s5p

Abstract

The broadening and shifting of spectral lines induced by collisions with the five noble gases in both the intercombination 5s 2 1 S 0 → 5s5p 3 P 1 system and the triplet 5s5p 3 P 0,1,2 → 5s6s 3 S 1 manifold of Sr are studied using tunable dye laser absorption spectroscopy. Cross sections for impact broadening and line shifting are determined from an examination of the spectral line profiles. These results are utilized in an analysis to compute difference potentials modeled by the Lennard-Jones ͑6-12͒ potential and the coefficients C 6 and C 12 derived from this analysis are reported.

Buffer-gas-induced collision shift for theSr88S1Shiga1, Liu2, Ito3 et al. 2009Phys. Rev. A6010View full textAdd to dashboardCite

“…[4] also the Doppler-limited spectroscopical method was used. It is clear that our results do not agree with those obtained using Doppler limited spectroscopy [4,6]. On the other hand our results agree well with those determined by Tino at al.…”

“…There is only one full set of data for rare gas pressure broadening and shifting of strontium intercombination line reported by Holtgrave and Wolf [6]. Results of Ref.…”

“…Results of Ref. [6] were obtained in the Doppler-limited regime at a temperature of 660(47) K, where the magnitude of the broadening and shifts exceed 100 MHz. Note that collisional broadening cross section determined by Holtgave and Wolf agree very well with those obtained by Crane et al [4] for Ar and and differ by 23% from those for Ne.…”

“…The spin-forbidden transitions 1 S 0 − 3 P 1 of atoms with two outer electrons have been major testing grounds due to their fairly narrow natural linewidths and level simplicity free from hyperfine structure. Experiments were done for Ca [4], Sr [4,5,6], Cd [7,8], Hg [9,10] and Yb [11] with perturber pressures of 10 0 − 10 2 Torr. In these experiments, shifts and broadening exceeds 10 MHz, and high order effects such as collision time asymmetry or speed-dependence of collisional broadening and shifting can be observed [12,13].…”

Division Xii / Commission 14 / Working Group Collision Processes

“…Fe II; 24188 lines broadened by collisions with H (Barklem & Aspelund-Johansson 2005). Sr: 5s 2 1 S 0 → 5s5p 3 P 1 and 5s5p 3 P 0,1,2 → 5s6s 3 S 1 transitions broadened by the rare gases (Holtgrave & Wolf 2005).…”