Product states of ${\mathrm{H}}_3^{+}$, ${\mathrm{H}}_2^{+}$, and ${\mathrm{O}}_2^{+}$ electron capture in Cs

A new technique to determine the final states and kinetic energies released in dissociative charge transfer is tested successfully on ${\mathrm{D}}_2^{+}$, ${\mathrm{D}}_3^{+}$, and ${\mathrm{O}}_2^{+}$ in a Cs vapor target. ${\mathrm{D}}_3^{+}$ yields both D+D+D and D+${\mathrm{D}}_2$ channel, ${\mathrm{D}}_2^{+}$ yields D+D from predissociation of ${\mathrm{D}}_2$($c{}_{}{}^3{}_{}{}^{}\Pi _u^{}{}_{}{}^{}$) and radiative dissociation of $a{}_{}{}^3{}_{}{}^{}\Sigma _g^{ +}{}_{}{}^{}$, and the $X {}_{}{}^2{}_{}{}^{}\Pi _g^{ +}{}_{}{}^{}$ and $a {}_{}{}^4{}_{}{}^{}\Pi _u^{}{}_{}{}^{}$ states present in ${\mathrm{O}}_2^{+}$ yield a surprisingly simple spectrum that is attributed to nearresonant- and Franck-Condon-type selection rules.