The Stark widths of the 3s-3p and 3p-3d transitions of singly ionized C, N,
O, F and Ne have been measured and compared with other experiments and sem
iclassical and semiempirical theoretical results in the plasma of a low-pre
ssure pulsed are. The plasma electron densities were determined from the wi
dth of He II P-alpha line while the electron temperatures were measured fro
m relative intensities of N II lines.