Measurements of the resonance scattering of the systems H-Hg andH2-Hg and determination of the isotopic mercury hydride potential

Abstract

The H-Hg total scattering cross section has been measured in the low-energy region (30-1520 ${\mathrm{cm}}^{-1\mathrm{}}$) in which resonance scattering is possible. A resonance observed at the energy of 43.4 ${\mathrm{cm}}^{-1\mathrm{}}$ has been attributed to the molecular state with rotational quantum number $l=9\mathrm{}$ and vibrational quantum number $\nu =3\mathrm{}$. This result provides improved information about the dissociation energy of the H-Hg molecule. The total-cross-section measurements, together with information from the bound states of the three isotopic systems, have been used to determine the potential in the pseudocrossing region. Measurements of the total cross section of the system ${\mathrm{H}}_2$-Hg are also reported.