Abstract
A new method of photoionization cross-section measurement based on the observation of saturation in the ion yield as a function of radiation intensity has been proposed. The photoionization cross-sections for the 62P1/2 and 62P3/2 levels of Rb atoms of the fundamental and second harmonics of ruby laser radiation are measured, with a tunable pulsed dye laser used for excitation. The following values of cross-sections are obtained: (1.7±0.4)·10−17 cm2 and (1.5±0.4)·10−17 cm2 for the levels 62P3/2 and 62P1/2, respectively, ionized by radiation of v2=14403 cm−1, and (1.9±0.5)·10−17 cm2 for the 62P3/2 level ionized by v2=28806 cm−1 radiation.
Similar content being viewed by others
References
A.Burgess, M.J.Seaton: Monthly Notices Roy. Astron. Soc.120, 121 (1960)
I.I.Sobel'man:Introduction to Atomic Spectra Theory (Fizmatgiz, Moscow 1961)
K.J.Nygaard, R.E.Hebner,Jr.: Paper presented at the VIIth Int. Conf. on the Physics of Electr. and Atom. Coll., Amsterdam, (1971)
A.I.Clucharev, I.S.Ryasanov: Opt. Spectr. (USSR)32, 1253 (1972)
A.I.Clucharev, V.Yu.Sepman: Opt. Spectr. (USSR)35, 1230 (1975)
G.S.Janes, I.Itzkan, C.T.Pike, R.H.Levy, L.Levin: Post-deadline Paper presented at the CLEA, Washington (1975)
T.W.Hänsch: Appl. Opt.11, 895 (1972
V.S.Letokhov, A.A.Makarov: J. Photochemistry2, 421 (1974)