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Helium hydride emission spectra at 550 and 640 nm
Journal of Chemical Physics
Emission spectra of three isotopomers of helium hydride (4HeH, 3HeH, and 3HeD) in the visible spectral region have been acquired using proton-beam irradiation of dense helium gas ( 150 Torr) at 4.2 K in the presence of some solid hydrogen or deuterium. Besides the previously reported D 2l:+ -A 2l:+ transition, near 550 nm, a second transition near 640 nm, identified as the D 2l: + _ B 2n, has been acquired and analyzed. The spectroscopic constants for both transitions have been obtained anddoi:10.1063/1.455337 fatcat:6bvalmqdu5golky6ubfnuxjuse