Pressure broadening and line shifting of atomic strontium 5s2 1S0→5s5p 3P1 and 5s5p 3P0,1,2→5s6s 3S1 absorption transitions induced by noble-gas collisions -: art. no. 012711

The broadening and shifting of spectral lines induced by collisions with the five noble gases in both the intercombination 5s(2) S-1(0)-> 5s5p P-3(1) system and the triplet 5s5p P-3(0,1,2)-> 5s6s S-3(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 (6-12) potential and the coefficients C-6 and C-12 derived from this analysis are reported.