Measured Stark widths and shifts for neutral phosphorus lines

Stark widths and shifts have been measured for six uv lines and three visible lines of neutral phosphorus in a wall-stabilized arc. The phosphorus is introduced into the arc in three forms: P${\mathrm{Cl}}_3$ vapor, atomized ${\mathrm{H}}_2$P${\mathrm{O}}_3$, and P${\mathrm{F}}_5$ gas. The results agree well with theory for both widths and shifts of the uv lines. It is suggested that the discrepancy with theory for the widths of the visible lines may be due to the neglect of Debye shielding in the theory.