Reduced absorption coefficients γBaBa were measured for the far-wing absorption of the self-broadened Ba 6s2 1S0-5d6p 1P1 line, Ba(6s2 1S0) + Ba(6s2 1S0) + ℏω → Ba*(5d6p 1P1) + Ba(6s 2 1S0) and the pair absorption Ba(6s 2 1S0) + Ba(6s2 1S 0 + ℏω → Ba*(6s6p 1P1 + Ba*(6s5d 1D2). The self-broadening shows the red-shaded asymmetric profile: γBaBa on the red wing is proportional to Δν-3/2, where Δν is the detuning from the line center. The pair absorption shows a broad asymmetric peak having a blue tail and a blue satellite. The estimated γBaBa which is based on the quasistatic line-broadening theory and the long-range dipole-dipole interaction between the relevant atomic excited levels, shows reasonable agreement for the red wing of the self-absorption whereas it gives larger values by a factor of 3 for the blue tail of the main peak for the pair absorption.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry