Figure 31.

Absolute intensity $I_{ph}$ of phosphorescence emission vs time t for vapor acetone (□) excited at wavelength $\lambda =310 \mathrm{nm}$, and vapor diacetyl (Δ) excited at wavelength $\lambda =410 \mathrm{nm}$, both at $p=5 \mathrm{kPa}$ and $T=293 \mathrm{K}$, and normalized by the intensity value $I_{ph,0}$ at $t=1 \mathsf{\mu }\mathrm{s}$. Data from Fratantonio et al. [172].