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Photoionization of the francium [7P.sub.3/2] state
- Source :
- Canadian Journal of Physics. March, 2017, Vol. 95 Issue 3, p234, 4 p.
- Publication Year :
- 2017
-
Abstract
- We have measured the non-resonant photoionization cross section of the [7P.sub.3/2] state of francium for 442 nm light to be 20.8 [+ or -] 7.1 Mb. Atoms were irradiated in a magneto-optical trap, and we deduce the photoionization rate from the change in trap lifetime. The result is consistent with a simple extrapolation of known cross sections for other alkali atoms. Key words: photoionization, alkali atoms, magneto-optical trap. Nous mesurons que la section efficace de photo-ionisation hors resonance de l'etat [7P.sub.3/2]] du francium pour une lumiere de 442 nm est de 20.8 [+ or -] 7.11 Mb. Les atomes sont irradies dans un piege magneto-optique et nous deduisons le taux de photo-ionisation a partir du changement du temps de vie du piege. Le resultat est coherent avec la simple extrapolation de sections efficaces connues pour d'autres atomes alcalins. [Traduit par la Redaction] Mots-cles: photo-ionisation, atome alcalin, piege magneto-optique, francium, etat excite.<br />1. Introduction The near-threshold photoionization of atoms is an important process to consider as a loss mechanism in two-species magnetooptical traps (MOTs) [1]. It is also of indirect importance in [...]
- Subjects :
- Photoionization -- Observations
Francium -- Optical properties
Physics
Subjects
Details
- Language :
- English
- ISSN :
- 00084204
- Volume :
- 95
- Issue :
- 3
- Database :
- Gale General OneFile
- Journal :
- Canadian Journal of Physics
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.487601461
- Full Text :
- https://doi.org/10.1139/cjp-2016-0311