Decay of the Ar 2p5ndcore resonances: An autoionization spectrum dominated by shake processes

Autoionization of Triply Excited Rydberg Series

“…It has been found that the spectator model is in good accord with the observations unless the Rydberg electron interacts noticeably with the inner electrons [15] and the same can be expected here.…”

“…The initial 4d orbital has the expansion 13:8:68:10 in terms of 3d 0 :4d 0 :5d 0 :6d 0 . Thus in this case the radial overlap ͗4dj4d 0 ͘ is ഠ0 as previously observed in Ar I [15,23]. This nonorthogonality is also observed in the calculated branching ratios where the 2s2p4d decay shows the branching 13 :9:74:11 to 3d 0 :4d 0 :5d 0 :6d 0 , confirming the small overlap between the 4d orbitals.…”

“…It has been known for some time [15,[20][21][22][23] that the existence of an inner hole can have profound influence on the orthogonality between initial and final state orbitals. This is easily understood when it is considered that the 2s 0 electron in the 1s2s 0 limit (we use a prime to distinguish final from initial state orbitals) sees the nuclear charge screened by the 1s electron while the 2s electron in the 2s2pnl states sees a basically unscreened nuclear charge.…”

Fundamental Aspects of Atomic Photoionization with High-Brightness Light Sources

“…In addition, it has been observed experimentally in multiphoton ionization of excited barium [71] as well as in autoionization of core-excited argon [72]. In any case, with the emergence of the technology to create and ionize such excited states [73,74], one has a new "laboratory" in which to study multielectron transitions.…”

Combination of lasers and synchrotron radiation in studies of atomic photoionization

“…However, a similar effect of strong contraction of orbitals upon ionization was also demonstrated after resonant 2p innershell excitation in atomic Ar, e.g. to the Ar*2p 5 4d excited state [47], where the orthogonality between the 4d wavefunction in the neutral 2p-excited state and the final Ar + 3p 4 4d state caused the complete breakdown of the spectator model frequently used for the description of the resonant Auger decay.…”