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Spectroscopy of hexafluorides with an odd number of electrons; Spectroscopie des hexafluorures a nombre impair d'electrons

Abstract

From a theoretical point of view, a tensorial formalism adapted to the study of molecules or octahedral ions with a half-integer angular momentum has been developed for the first time. We have used here the method of projective representations, more consistent than that of double groups. A complete set of coupling coefficients and formulas, as well as the corresponding computing programs have been elaborated. This has firstly allowed us to write a simple model describing the vibronic structure of colored hexafluorides. Then, some applications of this formalism to the study of ro-vibronic couplings of XY{sub 6} molecules in a fourfold degenerate electronic state have been considered, especially concerning operators associated to dynamic Jahn-Teller effect. From an experimental point of view, we have considered IrF{sub 6}, for which we have mastered the synthesis, purification and conservation processes. A first study at low resolution (absorption and Raman scattering) has been performed for this molecule. We have then set up two high resolution spectroscopic devices in the visible region (saturated absorption - tested with an iodine cell- and simple absorption with multiple pass). These especially use a dye laser. They should now allow the spectroscopy of the visible band of IrF{sub 6} in  More>>
Authors:
Publication Date:
May 01, 1995
Product Type:
Thesis/Dissertation
Report Number:
FRNC-TH-6256
Resource Relation:
Other Information: TH: These physique; 165 refs
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ELECTRONIC STRUCTURE; IRIDIUM FLUORIDES; JAHN-TELLER EFFECT; LASER SPECTROSCOPY; MOLECULES; ROTATIONAL STATES
OSTI ID:
20706664
Research Organizations:
Universite de Bourgogne, Lab. Physique, UMR CNRS 5027, 21 - Dijon (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR0504066021869
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
254 pages
Announcement Date:
Apr 27, 2006

Citation Formats

Boudon, V. Spectroscopy of hexafluorides with an odd number of electrons; Spectroscopie des hexafluorures a nombre impair d'electrons. France: N. p., 1995. Web.
Boudon, V. Spectroscopy of hexafluorides with an odd number of electrons; Spectroscopie des hexafluorures a nombre impair d'electrons. France.
Boudon, V. 1995. "Spectroscopy of hexafluorides with an odd number of electrons; Spectroscopie des hexafluorures a nombre impair d'electrons." France.
@misc{etde_20706664,
title = {Spectroscopy of hexafluorides with an odd number of electrons; Spectroscopie des hexafluorures a nombre impair d'electrons}
author = {Boudon, V}
abstractNote = {From a theoretical point of view, a tensorial formalism adapted to the study of molecules or octahedral ions with a half-integer angular momentum has been developed for the first time. We have used here the method of projective representations, more consistent than that of double groups. A complete set of coupling coefficients and formulas, as well as the corresponding computing programs have been elaborated. This has firstly allowed us to write a simple model describing the vibronic structure of colored hexafluorides. Then, some applications of this formalism to the study of ro-vibronic couplings of XY{sub 6} molecules in a fourfold degenerate electronic state have been considered, especially concerning operators associated to dynamic Jahn-Teller effect. From an experimental point of view, we have considered IrF{sub 6}, for which we have mastered the synthesis, purification and conservation processes. A first study at low resolution (absorption and Raman scattering) has been performed for this molecule. We have then set up two high resolution spectroscopic devices in the visible region (saturated absorption - tested with an iodine cell- and simple absorption with multiple pass). These especially use a dye laser. They should now allow the spectroscopy of the visible band of IrF{sub 6} in order to resolve for the first time its fine rotational structure. (author)}
place = {France}
year = {1995}
month = {May}
}