4p-5s transitions in In XIII, In XIV and In XV

The spectrum of an indium plasma produced by a 1.5 J, 25 ns ruby laser was recorded in the XUV. At wavelengths below 100 A, the spectrum is dominated by 4p-5s transitions in a number of ion stages. Many lines arising from 4p64d-4p54d5s, 4p6-4p55s and 4p5-4p45s transitions in In XIII, In XIV and In XV have been identified by isoelectronic extrapolation and Dirac-Fock calculations. (orig.)