The ground-state rotational constants of silane

Abstract
From thirty-nine combination difference equations we have determined three significant ground-vibronic state constants of silane: β 0/hc=2·85941 cm-1, γ 0/hc=-3·82×10-5 cm-1 and ε 0/hc=-7·97×10-7 cm-1 or in Hecht's notation B 0=2·85941 cm-1, D s=3·82×10-5 cm-1 and D t=2·436×10-6 cm-1.