Observation of an exciton luminescence of nitrogen crystals in the region of the vacuum ultraviolet
Fugol' I.Ya., Poltoratskii Yu.B., Savchenko E.V.
Two systems of bands, corresponding to the forbidden molecular transitions a 'ng—>X '2g + and a' ιΣ,~—*Arl2+g were observed in the emission spectrum of crystalline nitrogen in the vacuum ultraviolet region. A splitting of the vibronic bands was observed. Proof is presented of exciton character of the luminescence.