Cross Sections for Dielectronic Recombination of ${\mathrm{B}}^{2+}$ and ${\mathrm{C}}^{3+}$ via $2s\to 2p$ Excitation

Dielectronic recombination cross sections for the Li-like ions ${\mathrm{B}}^{2+}$ and ${\mathrm{C}}^{3+}$ via $1s^{2}2s\to 1s^{2}2p$ excitation are reported. The amount of electron capture attending the passage of megaelectronvolt/(atomic mass unit) ion beams through a collinear, magnetically confined, space-charge-limited electron beam is observed as a function of relative energy. The results agree well with distorted-wave calculations.