Emission Spectra of O2(1Δg) Trapped in Solid Oxygen at 4.2°K

Abstract

Emission spectra of the 0–0 band of the ${}^1{\Delta }_g{\mathrm{\hspace{0.17em}\to \hspace{0.17em}}}^3{\Sigma }_g^{-}$ system, and the 0–0 and 0–1 bands of the ${}^1{\Delta }_g{\mathrm{\hspace{0.17em}+\hspace{0.17em}}}^1{\Delta }_g{\mathrm{\hspace{0.17em}\to \hspace{0.17em}}}^3{\Sigma }_g^{-}{\mathrm{\hspace{0.17em}+\hspace{0.17em}}}^3{\Sigma }_g^{-}$ system of oxygen were observed in pure solid oxygen while a stream of microwave‐discharged oxygen was being condensed on a glass surface at liquid‐helium temperature. Both the single and double transitions were characterized as induced electric dipole transitions. The lifetime of the $O_2{(}^1{\Delta }_g)$ has been estimated to be <10⁻⁶ sec in solid oxygen at liquid‐helium temperature.