EXCITATION CROSS-SECTIONS OF THE PRASEODYMIUM ATOM

Excitation cross-sections of PrI were measured at an electron energy 3 0 eV for 82 spectral lines. We have used the method of extended crossi ng beams with detection of the optical signal. For half of the total n umber the energy dependences were measured in the electron energy rang e of 0...200 eV. The largest measured excitation cross-sections reach (5-8) x 10(-16) cm2. A classification is suggested for 18 previously u nclassified lines.