Electronic emission spectrum attributed to the arsenic monoselenide radical

Six red degraded bands in the region 5300–5700 Å have been observed and attributed to the radical AsSe. Arguments are presented to suggest that the bands arise from two subsystems of a²Π_r(a)-X²Π_r(a) transition and that the value of $\text{Δ}\text{G}{}_{\mathrm{<mtext>1</mtext><mtext>2</mtext>}}\text{″}$ is approximately 281 cm^?1.