Interchannel decay

PA = participant autoionization SA = spectator autoionization PDA = participant double autoionization, SDA = spectator double autoionization CA = cascade autoionization AD = Auger decay ASU = Augur decay with shake-up DAD = double Auger decay, ICD = interchannel decay. 

For AD the molecule is left in a 2-hole state with a -I- 2 charge, but the +1 ion also can be produced by coupling of the shape resonance to the valence electron ionization continuum. The co re hole shape resonance then relaxes by interchannel decay (ICD). AD and ICD can be distinguished by the... 

The total width of the resonance is directly given by the resonance complex energy. In the case where many channels of autodetachment are open, the question of partial widths for the decay into individual channels arises. This always requires analysis of the wave fimction. The problem of obtaining partial widths from complex coordinate computation has been discussed by Noro and Taylor (39) and Bcicic and Simons (40), and recently by Moiseyev (10). However, these considerations do not seem to have found a practical application. Interchannel coupling for a real, multichannel, multielectron problem has been solved in a practical way within the CESE method by Nicolaides and Mercouris (41). According to this theory the partial widths, 7, and partial shifts to the real energy, Sj, are computed to all orders via the simple formula... 

One of the useful consequences of the CESE approach, in conjunction with the related many-electron analysis, is the fact that it solves in a simple way the problem of computing partial decay widths, without or with interchannel coupling. In order to see this, I draw from the theory published in Refs. [37b, 101, 118-121]. 

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