Evolution of angular anisotropy of Auger emission across krypton 3d and xenon 4d thresholds

Strong impact of the giant resonance on the radiationless decay of the 4d vacancy in Xe: I. Decay of the 4d9np resonances

“…Figure 4 displays the I, β el , A 20 and O 10 parameters for the ( 3 P)6p 4 D 7/2 level, no 5. Our calculation of β el within the shake approach agrees well with the theoretical data of Tulkki et al (1994) and Huttula et al (2003) at both 4d 9 5/2 6p 3/2 and 4d 9 5/2 7p 3/2 resonances. However, the computed β el and, especially, O 10 differ from the measured ones.…”

“…Accounting for the interchannel interaction results in a considerable improvement of the agreement between experimental and theoretical data at the 4d 9 5/2 6p 3/2 resonance: β el even changes the sign. At the weak 4d 9 5/2 7p 3/2 resonance, our calculation within the 'shake' approach coincides with the calculation of Huttula et al (2003). However, the β el computed within the 2CPF approach agrees less with the measured parameter.…”

“…In these figures, the positions of the 4d 9 5/2 np 3/2 and 4d 9 3/2 6p 3/2,1/2 resonances are marked by grey and black vertical lines, respectively. All experimental data available to date (Huttula et al 2003, O'Keeffe et al 2004, Söderström et al 2011 are obtained in the 'sitting-on-resonance' regime, mainly for the 4d 9 5/2 6p 3/2 resonance. Huttula et al (2003) also measured the I and β el parameters at the 4d 9 5/2 7p 3/2 resonance of Xe providing also theoretical calculations which agree well with the calculation of Tulkki et al (1994) The parameters β el , A 20 and O 10 for the presented levels show strong variations across the high lying resonances, whereas at the lowest 4d 9 5/2 6p 3/2 resonance the variation is smaller.…”

“…All experimental data available to date (Huttula et al 2003, O'Keeffe et al 2004, Söderström et al 2011 are obtained in the 'sitting-on-resonance' regime, mainly for the 4d 9 5/2 6p 3/2 resonance. Huttula et al (2003) also measured the I and β el parameters at the 4d 9 5/2 7p 3/2 resonance of Xe providing also theoretical calculations which agree well with the calculation of Tulkki et al (1994) The parameters β el , A 20 and O 10 for the presented levels show strong variations across the high lying resonances, whereas at the lowest 4d 9 5/2 6p 3/2 resonance the variation is smaller. The two reasons account for these difference: (i) the direct transition amplitude to the J > 3/2 final ionic states equals zero in the shake approximation; (ii) the first 4d 9 5/2 6p 3/2 resonance is strongly separated from the other resonances and according to equation ( 2) their influence on it is weak (figures 4, 5 and 7 ).…”

“…Therefore, the line intensities I and PAD parameter β el measured in various papers differed on average by about 10% and 30%, respectively. The measurements of the I and β el have been later revisited at a resolution 20(1) meV (Huttula et al 2003) and 10(1) meV (Söderström et al 2011). From the comparison of the experimental and theoretical intensities and PAD parameters, it was clearly seen that for the final ionic states with high total angular momentum, the difference between measured and calculated values was drastic.…”