Photodetachment
= Photodetachment
<Photodetachment> removes an <electron> from an <anion> using a <photon>. For <chlorine>, the reaction is $\mathrm{Cl}^-(g)+\gamma\longrightarrow\mathrm{Cl}(g)+e^-$. Measuring the minimum <photon> <energy> for the specified final <quantum state> gives a <photodetachment threshold> and hence an <electron affinity>.