STARK-BROADENING OF RESONANCE TRANSITIONS IN B-III

We performed line profile measurements of the 2s-2p resonance transiti ons in B III in order to test quantum-mechanical (close-coupling) theo ry. The experiment was carried out using the well-diagnosed gas-liner pinch discharge where plasma parameters are determined independently b y 90 degrees Thomson scattering. The experimental Stark widths are abo ut twice the five-state close-coupling results. However, we find good agreement with semiclassical calculations in the electron-impact appro ximation.