Exciton-enhanced KrO excimer luminescence in doped solid krypton

Abstract

We have observed KrO excimer emission resulting from photoexcitation of cryodeposited films of Kr:${\mathrm{N}}_{2}$O. Both direct and exciton-enhanced dissociation of $\mathrm{O}(^{1}S)$ from ${\mathrm{N}}_{2}$O was observed. Our data yield a direct threshold of 7.9 eV and a relative quantum yield at higher resolution than recently reported for the gas phase. The large luminescent intensity observed indicates excimer decay via allowed $^{1}\ensuremath{\Sigma}^{+}\ensuremath{\rightarrow}^{1}\ensuremath{\Pi}$ and $^{1}\ensuremath{\Sigma}^{+}\ensuremath{\rightarrow}^{1}\ensuremath{\Sigma}^{+}$ transitions.