| 1. |
- Butorin, S.M, et al.
(author)
-
Tunable excitation x-ray-fluorescence spectroscopy in phase-analysis of high-Tc superconductors
- 1994
-
In: Journal of physics-condensed matter. - 0953-8984. ; 6:43, s. 9267-9274
-
Journal article (peer-reviewed)abstract
- O Kalpha x-ray fluorescence of YBa2Cu3O7-delta and Sr0.85Nd0.15CuO2 samples containing CO3(2-) impurities, as well as pure BaCO3, have been studied using tunable monochromatic synchrotron radiation excitation. When the excitation energy is set to the most intense features in the O 1s absorption edge of cuprates and to bound states above this edge the O Kalpha spectra recorded are very similar to those of pure BaCO3 even if the admixture of CO3(2-) is small. The observed changes in the O Kalpha profiles of multi-phase YBa2Cu3O7-delta and Sr0.85Nd0.15CuO2 samples are discussed in terms of different x-ray absorption cross sections for O in the main phase and in the CO3(2-) fraction.
|
|
| 2. |
|
|
| 3. |
- Glans, Peter, et al.
(author)
-
Determination of the lifetime width of the argon L1-hole state
- 1993
-
In: Physical Review A (Atomic, Molecular, and Optical Physics). - 1050-2947. ; 47:2, s. 1539-1542
-
Journal article (peer-reviewed)abstract
- The width of the argon 2s level was experimentally obtained from x-ray emission-spectroscopy (2.25+/-0.15 eV) and x-ray photoelectron-spectroscopy (XPS) (2.25+/-0.05 eV) measurements. A theoretical value of 1.85 eV was obtained by a Green's-function calculation. A high-energy satellite located 2.7+/-0.2 eV above the L1-M2,3 x-ray emission transition was confirmed and identified as the 2s(-1)3p-1-->3p-2 double-hole transition. The XPS measurement of the argon 2s ionization energy gave a value of 326.25(5) eV.
|
|
| 4. |
|
|
| 5. |
- Wassdahl, N., et al.
(author)
-
Synchrotron-radiation-excited soft-x-ray-fluorescence studies of Cu and Zn : On the validity of the sudden approximation
- 1990
-
In: Physical Review Letters. - 0031-9007. ; 64:23, s. 2807-2810
-
Journal article (peer-reviewed)abstract
- The L23 x-ray-emission spectra of Cu and Zn have been recorded using tunable-synchrotron-radiation-excited fluorescence spectroscopy. The satellite structure was studied in detail by varying the excitation energy from threshold to several hundred eV above. Strong satellites are observed which can unambiguously be associated with the decay of multiply excited states. This disproves recent claims of a breakdown of the sudden approximation in this regime.
|
|
