Relative X-ray transition probabilities to the K-shell

Hansen, J. S.; Freund, Hermann; Fink, R.W.

doi:10.1016/0375-9474(70)90816-x

Cited by 125 publications

(25 citation statements)

References 3 publications

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“…With the exception of the values by Kaastra & Mewe (1993), theory predicts a decrease of the ratio with N, and the theoretical scatter is comparable with that among the solid-state experiments of just under 20%. The computed results by , - and Jacobs & Rozsnyai (1986) for N = 25 are in good agreement with the bulk of the experimental values (Perujo et al 1987;Rao et al 1986;Berényi et al 1978;Salem et al 1972;Slivinsky & Ebert 1972;Hansen et al 1970). Hölzer et al (1997) mention a possible systematic deviation in one of their corrections to explain the discrepancy of their data with other measurements.…”

Section: Resultssupporting

confidence: 76%

“…2, theoretical and experimental Kβ/Kα intensity ratios are plotted as a function of electron number. Most experimental ratios (Rao et al 1986;Berényi et al 1978;Salem et al 1972;Slivinsky & Ebert 1972;Hansen et al 1970) have been scaled down by 8.8% in order to extract the radiative-Auger (5%) and Kβ 5 (3.8%) satellite contributions from the Kβ UTA which theory does not include (Verma 2000). The value quoted in Perujo et al (1987) does not take into account the blend with the Kβ 5 satellite and has been corrected accordingly.…”

Section: Resultsmentioning

confidence: 99%

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Modeling of iron K lines: Radiative and Auger decay data for $\ion{Fe}{ii}$–$\ion{Fe}{ix}$

Palmeri

Mendoza

Kallman

et al. 2003

A&A

139

127

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Abstract.A detailed analysis of the radiative and Auger de-excitation channels of K-shell vacancy states in Fe -Fe  has been carried out. Level energies, wavelengths, A-values, Auger rates and fluorescence yields have been calculated for the lowest fine-structure levels populated by photoionization of the ground state of the parent ion. Different branching ratios, namely Kα 2 /Kα 1 , Kβ/Kα, KLM/KLL, KMM/KLL, and the total K-shell fluorescence yields, ω K , obtained in the present work have been compared with other theoretical data and solid-state measurements, finding good general agreement with the latter. The Kα 2 /Kα 1 ratio is found to be sensitive to the excitation mechanism. From these comparisons it has been possible to estimate an accuracy of ∼10% for the present transition probabilities.

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Section: Resultssupporting

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Modeling of iron K lines: Radiative and Auger decay data for $\ion{Fe}{ii}$–$\ion{Fe}{ix}$

Palmeri

Mendoza

Kallman

et al. 2003

A&A

139

127

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“…21,22 The K␤/K␣ ratio was found to be typical for the element in accordance with relativistic theoretical calculations by Scofield. 23 Hansen et al obtained a better agreement with theory in KC experiments than earlier highresolution PI experiments and explained the deviations in the PI studies with experimental difficulties.…”

Section: B Earlier K Capture Studiessupporting

confidence: 85%

Influence of the core hole onKβemission following photoionization or orbital electron capture: A comparison using MnO and55Fe2
Glatzel
¹
,
Bergmann
²
,
Groot
³

et al. 2001
Phys. Rev. B
53
1
34
0
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The Mn K␤ fluorescence emission in MnO after photoionization and in 55 Fe 2 O 3 after radioactive electron capture decay from the K shell have been measured using a crystal array spectrometer with an instrumental energy bandwidth of 0.7 eV ͑full width at half maximum͒. Both compounds have a 3d 5 valence electron configuration in the ionic approximation. It is found that the spectral features after K capture in 55 Fe 2 O 3 are shifted in emission energy and are sharper, compared to the spectra following photoionization in MnO, i.e., the spectra exhibit a dependence on the mode of excitation. Crystal-field multiplet calculations including ligandto-metal charge transfer have been carried out for the 1s intermediate states as well as for the 3p to 1s (K␤) radiative transition. The populated 1s intermediate states after photoionization are found to be spread over several eV. In comparison, only the lowest-lying 1s intermediate states split by the weak (1s,3d) exchange interaction are populated after K capture. It is proposed that the differences in population of the 1s intermediate states together with a term-dependent final-state lifetime broadening can account for the changes in the spectral shapes due to the different modes of excitation.

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“…0,650-The counting efficiency ~:x in the formula of Chapter2 is composed of the single efficiencies of K~-radiation (98 % in the K-series of chlorine and 86 % 0,6 0 0 -in the K-series of bromine [9]) and of Ktj.~,...-radiation [8]. These single efficiencies are functions of the mass absorption coefficients, which were interpolated according to Veigele's table [,10]; the K-X-ray detection probabilities were calculated numerically o,55o- [,11].…”

Section: Evaluation Of Resultsmentioning

confidence: 99%

TheK-fluorescence yield of chlorine and bromine

Espenschied

Hoffmann

1978

Z Physik A

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Using a multiwire proportional counter with CH 4 and Ar as counting gases, the Kfluorescence yield of chlorine was determined to be COK = 0.101_+ 0.004, and the Kfluorescence yield of bromine was found to be co X =0.626+0.012. The respective sources were 3TAr and 81Kr, the latter produced by a (n, 7)-reaction from 8~The o)K-value of chlorine correlates with the theoretical computation of Walters and Bhalla [1], compared to that of bromine, which seems to confirm the theory of Kostroun et al. [18].

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Relative X-ray transition probabilities to the K-shell

Cited by 125 publications

References 3 publications

Modeling of iron K lines: Radiative and Auger decay data for $\ion{Fe}{ii}$–$\ion{Fe}{ix}$

Modeling of iron K lines: Radiative and Auger decay data for $\ion{Fe}{ii}$–$\ion{Fe}{ix}$

Influence of the core hole onKβemission following photoionization or orbital electron capture: A comparison using MnO and55Fe2
Glatzel
¹
,
Bergmann
²
,
Groot
³

et al. 2001
Phys. Rev. B
53
1
34
0
View full text Add to dashboard Cite

TheK-fluorescence yield of chlorine and bromine

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Relative X-ray transition probabilities to the K-shell

Cited by 125 publications

References 3 publications

Modeling of iron K lines: Radiative and Auger decay data for $\ion{Fe}{ii}$–$\ion{Fe}{ix}$

Modeling of iron K lines: Radiative and Auger decay data for $\ion{Fe}{ii}$–$\ion{Fe}{ix}$

Influence of the core hole onKβemission following photoionization or orbital electron capture: A comparison using MnO and55Fe2Glatzel1, Bergmann2, Groot3 et al. 2001Phys. Rev. B531340View full textAdd to dashboardCite

TheK-fluorescence yield of chlorine and bromine

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Influence of the core hole onKβemission following photoionization or orbital electron capture: A comparison using MnO and55Fe2
Glatzel
¹
,
Bergmann
²
,
Groot
³

et al. 2001
Phys. Rev. B
53
1
34
0
View full text Add to dashboard Cite