Knowledge Bank

Complex features of NH-He were observed in conjunction with the A-X 1-0 and 0-0 transitions. Bands appear to be clustered around the lowest rotational line of the monomer. The energy range spanned by the sharp structure is only $6.5cm-1$. The lowest energy feature is red shifted from the monomer by about $3cm-1$. A bound-free continuum spectrum was observed for $NH-H2$ in the region of the A-X 0-0 transition. Excitation to the A state is speculated to result in rapid $NH-H2->NH2+H$ reaction. The ground state dissociation energy of $D0\prime \prime =32.4cm-1$ was deduced from the spectrum. Theoretical analyses of the NH-He and $NH-H2$ A-X bands are in progress.