Zobrazeno 1 - 10
of 274
pro vyhledávání: '"T. Åberg"'
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 33:R49-R92
A brief survey of the resonant Raman Auger effect is presented. An outline of experimental considerations and equipment is given. The theory of the resonant Auger effect is outlined within the context of a resonant photoionization process, which we h
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 31:L775-L781
We use a simple potential well model to study the giant resonances in Ce, Sm, Eu and Gd. We show that photoionization of a d electron in a spherical potential well into a short-lived quasibound f state produces the observed asymmetric ion yield curve
Autor:
T. Åberg, Sami Heinäsmäki
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 31:1503-1510
We use multichannel resonant scattering theory for an extension of the conventional theory of autoionization resonances in photoabsorption. It incorporates autoionization induced by resonance fluorescence. As a result we obtain a modified Fano profil
Autor:
T. Åberg, Sami Heinäsmäki
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 30:4827-4837
The general cross section is expressed in terms of Stokes parameters of incoming and detected radiation. The dependence on the experimental arrangement is made explicit. Circular dichroism is considered for both randomly oriented and polarized target
Autor:
Sami Heinäsmäki, T. Åberg
Publikováno v:
Scopus-Elsevier
Differences in cross-sections for left and right cir- cularly polarized light are analyzed for radiative and non- radiative inelastic scattering by randomly oriented systems. It is shown that special experimental arrangements result in finite dichroi
Publikováno v:
Physica Scripta. 50:357-363
Above-threshold photoelectron detachment and ionization spectra are investigated theoretically in the tunneling and over-barrier regime as a function of wavelength (≥1.064 μm) and polarization of the electromagnetic field. It is found that the zer
Autor:
T. Åberg, G. B. Armen
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 27:L579-L584
We consider the continuous X-ray distribution on the low-energy side of the Kalpha line in projectile spectra coincident with single-electron loss in collisions of lithium-like ions with helium. We demonstrate that the observed distributions are due
Autor:
Alberto Herrera-Gomez, Joseph C. Woicik, Tom Kendelewicz, K. E. Miyano, Stephen H. Southworth, T. Åberg, Mau Hsiung Chen, Anna Mäntykenttä, Bernd Crasemann, Honghong Wang
Publikováno v:
Physical Review A. 50:1359-1371
The evolution of K-${\mathit{L}}_{2,3}$${\mathit{L}}_{2,3}$ $^{1}$${\mathit{D}}_{2}$ radiationless resonant Raman scattering into Auger-electron emission was studied by tuning synchrotron radiation across the K edge of P in InP. The spectrum can be i
Publikováno v:
Physical Review A. 50:1218-1230
Synchrotron-radiation excited ion mass spectrometry has been used to study the 3s3${\mathit{p}}^{6}$np(n\ensuremath{\ge}4) resonances in argon at 25.0--29.3 eV. It is shown using a time-independent resonant scattering approach that the Fano parametri
Publikováno v:
APMIS. 102:623-632
The lungs of pigs receiving long-term total parenteral nutrition (TPN) have been studied. A total of 20 pigs were tentatively infused with TPN through central venous catheters for 7 weeks. To secure adequate nutrition and gastrointestinal absorbance