Effect of excitation-autoionization processes on the line emission of Zn <span class="sc">i</span>– and Ga<span class="sc">i</span>–like rare-earth ions in hot coronal plasmas

P. Mandelbaum; M. Finkenthal; E. Meroz; J. L. Schwob; J. Oreg; W. H. Goldstein; M. Klapisch; L. Osterheld; A. Bar Shalom; S. Lippman; L. K. Huang; H. W. Moos

doi:10.1103/PhysRevA.42.4412

Rapid Communication

Effect of excitation-autoionization processes on the line emission of Zn i– and Gai–like rare-earth ions in hot coronal plasmas

P. Mandelbaum, M. Finkenthal, E. Meroz, J. L. Schwob, J. Oreg, W. H. Goldstein, M. Klapisch, L. Osterheld, A. Bar Shalom, S. Lippman, L. K. Huang, and H. W. Moos

Phys. Rev. A 42, 4412(R) – Published 1 October 1990

Abstract

A systematic variation in the line-intensity ratios of Gai– and Zni–like Pr (Z=59) to Dy (Z=66) ions has been observed in spectra emitted by atoms injected in a low-density high-temperature tokamak plasma. This variation is shown to be correlated with the progressive closing of the autoionizing channels through the excited 3 $d^{9}$ 4 $s^{2}$ 4p4f configuration in the Gai–like ionization state as Z increases.