Abstract
Inert-gas-induced collisional transfer between the first four excited states of Sr has been measured by determining excited-state densities following pulsed laser excitation of the 5 P state. We observe 5 P collisional transfer exclusively to the 4 D state, with (∼800 K) rate coefficients ranging from 0.24 to 2.0× for the various gases. We also measure 4 transfer primarily to the 4 D state, with rate coefficients of 0.65 to 6.8× . The 4 D state radiative lifetime is observed to be 2.9±0.2 μs, collisional mixing between the 4 fine-structure levels is essentially gas kinetic (k∼5× ), and k< for 4 D→5 P collisional transfer.
- Received 4 March 1992
DOI:https://doi.org/10.1103/PhysRevA.46.1303
©1992 American Physical Society