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LIF Study of the b1Σ+(b0+) ↔ X3Σ−(X10+,X21) Transitions of SbH and SbD

✍ Scribed by O. Shestakov; R. Gielen; A.M. Pravilov; K.D. Setzer; E.H. Fink

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
227 KB
Volume
191
Category
Article
ISSN
0022-2852

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✦ Synopsis

The b 1 ⌺ ϩ (b0 ϩ ) 7 X 3 ⌺ Ϫ (X 1 0 ϩ ,X 2 1) transitions of SbH and SbD have been studied by laser-induced fluorescence measurements. Ground state SbH(SbD) radicals were generated in a fast-flow system by reaction of microwave-discharged hydrogen (deuterium) with antimony vapor. Vibrational levels v ϭ 0 and 1 of the b 1 ⌺ ϩ state were excited with a pulsed dye laser. In addition to five electric dipole branches S R, Q P, Q R, Q Q, and O P, weak magnetic dipole branches P Q were observed in the 0 -0 bands of the b 1 ⌺ ϩ 4 X 3 ⌺ Ϫ transitions. Rotational and vibrational constants of the X 3 ⌺ Ϫ and b 1 ⌺ ϩ states were deduced from high-resolution excitation spectra. Time-resolved measurements of the fluorescence decay and measurements of relative line and band intensities allowed determination of the radiative lifetime of the b 1 ⌺ ϩ state of SbH ( ϭ 173 Ϯ 3 s) and of the electric and magnetic dipole transition moments 0 ϭ Ϯ0.036 D, 1 ϭ ϯ0.058 D, |M| ϭ 1.62 Bohr magnetons.

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