Spectra of Lead Hydride and Tin Hydride in the Near Infra-Red

Abstract

Revised calculations of energy constants of the PbH molecule are presented as a result of analyses of bands in the photographic infra-red. Former ${v}^{\ensuremath{'}}$ values are raised by one unit. An isolated weak PbH band is found at 3815A. Additional SnH bands in the red produced in the high pressure arc are briefly discussed.