MEASUREMENT OF ATOMIC PARAMETERS OF SINGLY IONIZED ARGON LINES .2. TRANSITION-PROBABILITIES

In order to obsrve spectral lines of ArII, corresponding to transition s from levels of high excitation energy, and to have the highest possi ble temperature and free electron density in the applied light source, we have observed side-on the near cathode zone of an electric are of I-arc = 200 A current, burning in pure argon at atmospheric pressure. Spectroscopic diagnostic of the observed zone showed, that it was char acterized by high temperature and electron densities of the order of T approximate to 24,000 K and N-e approximate to 2 x 10(23) m(-3), resp ectively. Altogether, we have registered more than 90 spectral lines f rom different levels and configurations, e.g., for which the upper;lev els belong to the 4f configuration (excitation energy E(i) > 24 eV), 5 s and 3d'' (E(i) > 22 eV). We were able to determine the transition pr obabilities of 92 ArII lines, relative to the 480.602 nm ArII line, an d Stark widths of some 80 ArII lines. Our transition probabilities and Stark widths for ArII lines, in many cases measured for the first tim e, are consistent with the best data published up to now and give one of the most complete sets of results. The applied experimental procedu re and characteristics of the investigated singly ionized argon lines are presented in the first part of this series. In this second part, w e present our results concerning the transition probabilities of 92 si ngly ionized argon lines. (C) 1997 Elsevier Science Ltd.