Fine-structure splitting of the L2-MM(3P0,1,2) and L3-MM(3P0,1,2) Auger lines in argon

Ridder, D. De; Dieringer, Jon A.; Stolterfoht, N.

doi:10.1088/0022-3700/9/11/003

Cited by 26 publications

(9 citation statements)

References 12 publications

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“…In the case of PCI after photoionization, where we have three charged particles in the final state, the lineshift and the distortion of the lineshape of Auger electrons have been measured (Borst and Schmidt 1986) and very good agreement was found with the results of semiclassical theory (Russek and Mehlhorn 1986). Later, Armen et al (1987) showed that the results of their quantum mechanical treatment of PCI after photoionization are in excellent agreement with results obtained by semiclassical theories (Russek andMehlhorn 1986, Kuchiev andSheinerman 1986).…”

Section: Introductionsupporting

confidence: 66%

Post-collision interaction after inner-shell ionization by electron impact: the shape of Auger lines

Kuhn¹,

Feuerstein²,

Mehlhorn³

2001

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

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We measured the lineshapes of Ne K-L2,3L2,3 and Ar L2,3-M2,3M2,3 Auger electrons distorted by post-collision interaction (PCI) for electron-impact ionization. The excess energies E1 = E0-I(nlj) (E0 and I(nlj) are the incident and the ionization energies) were 27-427 eV for Ne K ionization and 12-750 eV for Ar L3 ionization. For comparison we calculated theoretical Auger spectra where the PCI-distorted lineshape, obtained in eikonal theory (Sheinerman et al 1994 J. Phys. B: At. Mol. Opt. Phys. 27 5681), was convolved with the experimentally known spectrometer function and a Gaussian function for the Doppler effect of the thermally moving target atoms. The agreement of experimental and theoretical spectra is excellent in all cases. This demonstrates the quality of eikonal theory in calculating the PCI-distorted Auger lineshapes.

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Section: Introductionsupporting

confidence: 66%

Post-collision interaction after inner-shell ionization by electron impact: the shape of Auger lines

Kuhn¹,

Feuerstein²,

Mehlhorn³

2001

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

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“…Nevertheless, we used the above equation for diagram Auger lines obtained in our single measurements and the ξ asymmetry parameter is considered as an adjustable parameter. In the model spectra we used fixed triplet intensity ratios (Ridder et al 1976) and the same values of L and ξ for all the 10 diagram Auger lines.…”

Section: Data Evaluationmentioning

confidence: 99%

Observation of electron impact inner-shell excitation of argon by means of satellite Auger spectra

Paripás

Vikor

Ricz

1997

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

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We have studied the inner-shell excited states of argon below the 2p thresholds for electron-impact excitation in the range of the incident energy E 0 = 275-1700 eV. We carried this out through the measurement of the electrons emitted during the decay of the states. The corresponding satellite peaks in the spectra of the emitted electrons were separated from the normal (diagram) LMM Auger peaks by a special evaluating process. We observed the satellite peaks coming from the 2p −1 (2 P 3/2)4s → 3p −2 (1 D)4s, 2p −1 (2 P 3/2)4p → 3p −2 (1 D)4p and 2p −1 (2 P 3/2)3d → 3p −2 (1 D)4d transitions at all applied incident energies. The intensity of the satellite peaks increased approaching the ionization threshold (E 0 = 275-300 eV). Nevertheless in the range E 0 = 1000-1700 eV we could identify more satellites due to the lower continuous background and the smaller post-collision interaction effects.

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“…The same holds true for x-ray lines and, especially, Augcr lines of the light elements [33,44,45], unless too many hole states are present as in the case of most ion-atom collisions. A drastic change in the lifetime of the L 2 ,3 level of argon in the presence of an M 2,3 hole has been noted in an Auger spectrum (16,23,41), in which the single~hole, diagram line is w~ll separated in energy from the double-hole, satellite line.…”

Section: Effects Influencing the Widthsmentioning

confidence: 99%

“…, free-atom data[14][15][16][17][18][19][20][21][22][23][24][25][26], mostly of recent origin, aTe compared with semi-empiric&l values. Generally, satisfactory accord is noted except for the KL,L, and KL,L, widths of argon.…”

mentioning

confidence: 99%

Natural widths of atomic K and L levels, Kα X-ray lines and several K L L Auger lines

Krause¹,

Oliver²

1979

Journal of Physical and Chemical Reference Data

1,482

666

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Semi-empiricalv8.Iues of the natural widths of K, L I' L2 and L:l levels, Kat and Kaz x-ray lines, and KL~l' KL~2 and KL~3 Auger lines for the dements 10 :s: Z :s: 110 are presented in tables and graphs. Level width fi (i = K, L 1 , L 2 , L 3) is obtained from the relation r i = rn,;lw;, using the the•oretical radiative rate rl{.i from Scofield's relativistic, relaxed Hartree-Fock calculation and the fluorescence yield Wi from Krause's evaluation. X-ray and Auger line widths are calculated as the sums of pertinent level widths. This tabulation of natural level and line widths is internally consistent, and is compatible with all relevant experimental and theoretical informatibn. Present semi-empirical widths, especially those of Ka 1 and Kaz x-rays, are compared with measured widths. Uncertainties of semi-empirical values are estimated.

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Fine-structure splitting of the L₂-MM(³P_0,1,2) and L₃-MM(³P_0,1,2) Auger lines in argon

Cited by 26 publications

References 12 publications

Post-collision interaction after inner-shell ionization by electron impact: the shape of Auger lines

Post-collision interaction after inner-shell ionization by electron impact: the shape of Auger lines

Observation of electron impact inner-shell excitation of argon by means of satellite Auger spectra

Natural widths of atomic K and L levels, Kα X-ray lines and several K L L Auger lines

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