Abstract
The b1Σ+(b0+) ↔ X3Σ−(X10+,X21) 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 levelsv= 0 and 1 of theb1Σ+state were excited with a pulsed dye laser. In addition to five electric dipole branchesSR,QP,QR,QQ, andOP, weak magnetic dipole branchesPQwere observed in the 0–0 bands of the b1Σ+← X3Σ−transitions. Rotational and vibrational constants of theX3Σ−andb1Σ+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 theb1Σ+state of SbH (τ = 173 ± 3 μs) and of the electric and magnetic dipole transition moments μ0= ±0.036 D, μ1= ∓0.058 D, |M| = 1.62 Bohr magnetons.
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