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The Group VI elements, selenium and tellurium, are found to react with fluorine emitting a broad spectral chemiluminescence. The chemiluminescence is characteristic of that emitted by a diatomic molecule. The proposed emitting species are SeF and TeF. Selenium reacts with fluorine with a weak chemiluminescence in the visible between 3800 A and 8900 A. Identical spectra are obtained regardless of whether the source of selenium is the elemental vapor or hydrogen selenide. In the hydrogen selenide/fluoride reaction, vibrationally excited HF is produced with the identified bands: (4,0), (5,1), (6,2), and (3,0) super-imposed on the SeF chemiluminescence.

Two full-scale zinc selenide deposits were successfully conducted conducted using the evaporator system. The optical and mechanical quality of the material produced appears to be the equivalent of that made in the reservoir system. (Author)