MG 3PND (J = 3) AUTOIONIZATION SPECTRA USING ISOLATED-CORE EXCITATION

The Mg 3pnd J=3 autoionizing spectra have been studied for n values ranging from 9 to 40, using an isolated-core excitation technique with ion detection. The measured spectra are found to be in generally excellent agreement with results from a calculated reaction matrix. The observed spectra exhibit strong interseries interactions between the 3p1/2nd5/2 and 3p3/2ndj series, and, for n 15, interferences between the amplitudes for excitation of the core electron to the 3P1/2 and 3P3/2 ion states. Classifications of states for n 29 are tabulated. We discuss the difficulties in deducing autoionization rates for Mg from the experimental and theoretical data, the implications of which could have relevance to dielectronic recombination rate calculations. © 1990 The American Physical Society.