The near-ultraviolet and visible bands of antimony monofluoride

The near-ultraviolet and visible emission bands of the SbF molecule have been photographed at high dispersion and rotational analyses performed. The principal molecular constants (in cm^?1) obtained for ¹²¹SbF and ¹²³SbF are

$\text{X}{}_2\text{1:}{}^{121}\text{B}{}_{\mathrm{e}}\text{=0.2803;}{}^{123}\text{B}{}_{\mathrm{e}}\text{=0.2796;α}{}_{\mathrm{e}}\text{=1.93×10}{}_{\mathrm{?3}}$

$\text{a2:}{}^{121}\text{B}{}_{\mathrm{e}}\text{=0.2806;}{}^{123}\text{B}{}_{\mathrm{e}}\text{=0.2801;α}{}_{\mathrm{e}}\text{=1.87×10}{}_{\mathrm{?3}}$

$\text{B0}{}^{\mathrm{+}}\text{:}{}^{121}\text{B}{}_0\text{=0.2800;}{}^{123}\text{B}{}_0\text{=0.2791,}$

$\text{A0}{}^{\mathrm{+}}\text{:}{}^{121}\text{B}{}_0\text{=0.2385;}{}^{123}\text{B}{}_0\text{=0.2378,}$

$\text{A}{}_2\text{2:}{}^{121}\text{B}{}_{\mathrm{e}}\text{=0.2411;}{}^{123}\text{B}{}_{\mathrm{e}}\text{=0.2405;α}{}_{\mathrm{e}}\text{=1.65×10}{}_{\mathrm{?3}}$

$\text{A}{}_3\text{1:}{}^{121}\text{B}{}_{\mathrm{e}}\text{=0.2414;}{}^{123}\text{B}{}_{\mathrm{e}}\text{=0.2409;α}{}_{\mathrm{e}}\text{=1.70×10}{}_{\mathrm{?3}}$