Absolute photoionization cross sections for Kr(5 s ) and Kr2 5 s  3Σ+ u (1 u , 0− u ) excited states at 248 nm

• Published in: The Journal of chemical physics 1987-01, Vol.86 (2), p.577-587
• Main Authors: Geohegan, D. B., McCown, A. W., Eden, J. G.
• Format: Article
• Language: English
• ISSN: 0021-9606; 1089-7690
• DOI: 10.1063/1.452310

Absolute cross sections for the photoionization of Kr (5s) and Kr2 5s 3Σ+u (1u, 0−u ) at 248 nm have been measured to be (5.7±1.1)×10−19 and (1.4±0.3)×10−18 cm2, respectively. In these experiments, absolute photoelectron densities were measured in real time with a microwave absorption apparatus, and the excited atomic and molecular species were produced and subsequently photoionized by excimer lasers. The measured Kr (5s) cross section is consistent with the upper limit experimentally determined by Dunning and Stebbings [Phys. Rev. A 9, 2378 (1974)] and is close to the theoretical value calculated by Hartquist [J. Phys. B 11, 2101 (1978)]. For Kr2 5s 3Σ+u (1u, 0−u) , the cross section reported here is intermediate to those measured previously for the lowest 3Σ+u states of Ar2 and Xe2.