INTERFERENCE EFFECTS IN THE CHARGE-INDUCED SPECTRUM OF H-2 AT 4.2 K

The fundamental vibrational infrared-absorption spectrum of solid H//2 at 4. 2 K has been measured while the sample was irradiated with a 15-Mev proton beam. The Stark-shifted molecular transitions resulting from molecules that are the nearest neighbors of localized electrons have been observed and are contrasted with the same transition previously observed in solid D//2. The differences are interpreted as evidence of an interference between the dipole of the localized electron and the charge-induced molecular dipole, a result of a coincidence in the frequencies of the molecular and electronic transitions.