ISSN:
1432-0649
Keywords:
32.80.-t
;
32.80.Fb
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract In Resonance Ionization Spectroscopy, neutral atoms are usually produced by thermal effects, using an oven or a hot surface at high temperature. The radiation from these thermal sources is intense enough to effectively contribute to the photoionization of atoms excited by laser pumping. We show that, for the most common experimental conditions, the ratio of thermal to laser photoionization can be higher than one for excited levels which lie as far as a few thousand cm−1 below the ionization threshold. This result is obtained with the use of the analytic expression for the photoionization cross-section of a hydrogen-like atom. We suggest two applications of this thermal photoionization. Namely, the study of highly excited states and Quasi Resonance Ionization Spectrometry, using only one laser of low radiance.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00330089
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