THE CASE OF A UNIQUE AUTOIONIZATION DECAY DYNAMIC - THE 3P-]ND RESONANCES IN CR

A unique autoionization decay dynamic is encountered in Cr. It embrace s several correlated processes. First, the 3p --> 3d and the rest of t he 3p --> nd resonant excited orbitals are subject to dramatic orbital anti-collapse. Second, the giant 3p --> 3d resonance and the rest of the 3p --> nd Rydberg series are essentially configurationally mixed w ith one another. Third. what is particularly unusual is that the giant 3p --> 3d resonance decays while the orbital anti-collapse is in full progress. This dramatically affects not only the final parameters of the 3p --> 3d resonance itself, but through the configuration mixing t his critically reflects on those for the rest of the 3p --> nd Rydberg series. All this finally results in the unique resonance structure in the 3p absorption spectrum of Cr, which has been a puzzle for many ye ars. A way to introduce what are called the 'relaxed transition states ' for the 3p --> 3d autoionizing decay and thus to describe correctly the whole resonance structure in Cr is proposed. Good agreement betwee n the calculated and experimental data for the Cr 3p absorption is ach ieved.