Subshell-dependent relaxation in the Auger effect

Tulkki, Jukka; Mäntykenttä, A.

doi:10.1103/physreva.47.2995

Cited by 21 publications

(20 citation statements)

References 17 publications

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“…In table 4 the experimental intensity distribution in both the resonant and normal Auger spectra is compared with predictions produced by several calculational methods excluding or including the FISCI. The Hartree-Fock (HF) calculations were made with Cowan's code [19], while the MCDF calculations of [5] and multichannel multiconfiguration Dirac-Fock (MMCDF) calculations of [20] were carried out with the method described in [21]. In calculations denoted by MCDF b and HF b the semi-empirical mixing coefficients from [17] were used to produce the redistribution of intensities caused by FISCI.…”

Section: Effects Of Fisci In Intensity Distributionmentioning

confidence: 99%

High resolution study of correlation satellites in the - resonant Auger spectra of Kr

Mursu¹,

Jauhiainen²,

Aksela³

et al. 1998

J. Phys. B: At. Mol. Opt. Phys.

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Final ionic state-configuration interaction (FISCI) between bound 4s −1 4p −1 np and 4s 2 4p −3 mdnp final states in the Auger decay of resonantly excited Kr 3d −1 np states has been studied by synchrotron-radiation-excited electron spectroscopy utilizing the Auger resonant Raman effect. It is found that the effects of FISCI are essentially the same as in the corresponding normal Auger spectra. Especially in the 3d −1 5p → 4s −1 4p −1 5p spectra the role of FISCI is to distribute the intensity from the 4s −1 4p −1 5p 'diagram' states to the 4s 2 4p −3 4d5p 'satellite' states without remarkably affecting the branching ratio of the 'diagram' lines. Furthermore, the experimental shake probabilities are not affected by FISCI.

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Section: Effects Of Fisci In Intensity Distributionmentioning

confidence: 99%

High resolution study of correlation satellites in the - resonant Auger spectra of Kr

Mursu¹,

Jauhiainen²,

Aksela³

et al. 1998

J. Phys. B: At. Mol. Opt. Phys.

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“…Except for the initial state nds/2(n+2)ps/2 which is an almost pure jj coupled state, all other initial and final bound states are far from either the jj or the LS coupling limit and therefore the assignments given to them are intended only to serve as tags of the transitions. The interaction between continuum channels and the orbital relaxation taking place during Auger emission were neglected in the present calculations, although both these effects may give a nontrivial contribution to the intensity and angular distributions of Auger transitions discussed in this work [5,19,20]. For a detailed discussion of the numerical approach see Ref.…”

Section: A Generalmentioning

confidence: 99%

Influence of the initial- and final-state configuration interaction on the anisotropy of the resonant Auger decay of Kr 3d−15pand Xe 4
Tulkki
¹
,
Aksela
²
,
Kabachnik
³

1994
Phys. Rev. A
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47
8
32
1
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The anisotropy of the resonant Auger decay of photon-excited Kr 3d~i'~5~5p and Xe 4d3/Q 5i$6p states has been studied by the multiconfiguration Dirac-Fock method. The calculations account for the configuration interaction both in the initial and in the 6nal states of the Auger decay. For the nonresolved nd (n+ 2)p (J = 1) resonances (n = 3 for Kr, and n = 4 for Xe) the average intensities and the anisotropies of the Auger lines were calculated by weighing each partial rate by the pertinent Dirac-Fock photoexcitation probabilities. Our results show that, in addition to the initialand Gnal-state correlation, both the relaxation and the exchange interaction have a substantial effect on the anisotropy of these Auger spectra. For most Auger lines there is good agreement between our calculated P parameters and experimental values for the Kr and Xe nd i (n+ 2)p photoexcitation resonances; there is also satisfactory agreement for the Kr 3d~i'~5p and Xe 4d~i~6p resonant Auger spectra. However, the remaining notable discrepancies between theory and experiment indicate that important correlation effects are still omitted in our calculations. Discrepancies between difFerent experimental results stress the need for further improvements on the experimental side.PACS number(s): 32.80.Hd, 32.80.Fb

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“…Shortly after the publication in 1987 of the experimental absolute photoionization cross section Nasreen et al (1988) calculated the absolute photoionization cross section using the relativistic random-phase approximation (RPA) and obtained excellent agreement with the experimental cross sections measured by . Later Tulkki (1993) investigated the influence of relaxation and finalstate channel interaction on the 3p and 3s photoionization of K + , utilizing the multiconfiguration multichannel Dirac-Fock method. The results obtained were also in good agreement with the experimental cross section of .…”

Section: Introductionmentioning

confidence: 99%

Absolute photoionization cross section of K⁺ions from the 3p to the 3s threshold

Kjeldsen

Folkmann

Knudsen

et al. 1999

J. Phys. B: At. Mol. Opt. Phys.

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The absolute photoionization cross section of ground state K + ions has been measured from the 3p threshold to above the 3s threshold (31-49 eV) by VUV radiation using a merged ionphoton beam set-up. The cross section, which reaches a maximum value of 32 Mb ±10% at 31.8 eV and then decreases with energy, is in overall good agreement with absolute measurements by Peart and Lyon, but the present investigation also reveals the 3s3p 6 np 2 P (n = 4-6) resonances and eliminates a previously unassigned structure at 35.5 eV. The energies, widths and shape parameters of the autoionizing 2 P resonances are determined and compared with recent data from dual-laser plasma measurements and with theoretical predictions. The present experimental set-up will allow absolute photoionization cross sections 0.1 Mb to be measured, making it possible to measure the absolute photoionization cross sections of ions of astrophysical importance.

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Subshell-dependent relaxation in the Auger effect

Cited by 21 publications

References 17 publications

High resolution study of correlation satellites in the - resonant Auger spectra of Kr

High resolution study of correlation satellites in the - resonant Auger spectra of Kr

Influence of the initial- and final-state configuration interaction on the anisotropy of the resonant Auger decay of Kr 3d−15pand Xe 4
Tulkki
¹
,
Aksela
²
,
Kabachnik
³

1994
Phys. Rev. A
Self Cite
47
8
32
1
View full text Add to dashboard Cite

Absolute photoionization cross section of K⁺ions from the 3p to the 3s threshold

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Subshell-dependent relaxation in the Auger effect

Cited by 21 publications

References 17 publications

High resolution study of correlation satellites in the - resonant Auger spectra of Kr

High resolution study of correlation satellites in the - resonant Auger spectra of Kr

Influence of the initial- and final-state configuration interaction on the anisotropy of the resonant Auger decay of Kr 3d−15pand Xe 4Tulkki1, Aksela2, Kabachnik3 1994Phys. Rev. ASelf Cite478321View full textAdd to dashboardCite

Absolute photoionization cross section of K+ions from the 3p to the 3s threshold

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Influence of the initial- and final-state configuration interaction on the anisotropy of the resonant Auger decay of Kr 3d−15pand Xe 4
Tulkki
¹
,
Aksela
²
,
Kabachnik
³

1994
Phys. Rev. A
Self Cite
47
8
32
1
View full text Add to dashboard Cite

Absolute photoionization cross section of K⁺ions from the 3p to the 3s threshold