van Kampen, P;OSullivan, G;Ivanov, VK;Ipatov, AN;Costello, JT;Kennedy, ET

1997

April

Physical Review Letters

Dramatic changes in the 3s autoionization process at the beginning of the Ar I sequence

Published

37 ()

CROSS-SECTIONS CORRELATION SATELLITES EXTREME-ULTRAVIOLET PHOTOIONIZATION ARGON SPECTRUM IONS PHOTOIONISATION PHOTOELECTRON RESONANCES

78

3082

3085

The 3s --> np resonances were observed to change dramatically in appearance with increasing ionization along the ArI sequence, and within the 3s --> np channel of Ca2+. By applying the Dyson equation method to positive ions for the first time, newly investigated double-electron processes were shown to play a crucial role in the interpretation of the resonance structure. The changes within the resonances result from their position relative to the Cooper minima in the 3s and 3p photoabsorption.

COLLEGE PK

0031-9007