| 1. |
- Christiansson, Lena, et al.
(author)
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Expanding environmental Perspectives
- 1994
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In: Expanding environmental perspectives : lessons of the past, prospects for the future. - 917966279X ; , s. 119-142
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Book chapter (other academic/artistic)
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| 2. |
- Wassdahl, N., et al.
(author)
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Soft x-ray emission studies of adsorbates
- 1992
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In: Physical Review Letters. - 0031-9007. ; 69:5, s. 812-815
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Journal article (peer-reviewed)abstract
- Soft x-ray emission spectroscopy is for the first time applied to surfaces and adsorbates. Surface sensitivity is achieved by employing synchrotron radiation in grazing incidence for the excitation. We present O K emission from adsorbed atomic oxygen on Ni(100) and Cu(100) and molecular CO on Ni(100). The observed spectral features correspond to the occupied 2p partial density of states of the adsorbates.
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| 3. |
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| 4. |
- Wassdahl, N., et al.
(author)
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Synchrotron-radiation-excited soft-x-ray-fluorescence studies of Cu and Zn : On the validity of the sudden approximation
- 1990
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In: Physical Review Letters. - 0031-9007. ; 64:23, s. 2807-2810
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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.
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| 5. |
- Andersen, Jesper N, et al.
(author)
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Photoemission Spectroscopy At Max-Lab
- 1991
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In: Synchrotron Radiation News. - : Informa UK Limited. - 0894-0886 .- 1931-7344. ; 4:4, s. 15-19
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Journal article (peer-reviewed)
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| 6. |
- Björneholm, O., et al.
(author)
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Resonant photoemission at core-level shake-up thresholds : Valence-band satellites in nickel
- 1990
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In: Physical Review B (Condensed Matter). - 0163-1829. ; 41:15, s. 10408-10412
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Journal article (peer-reviewed)abstract
- Three-hole satellites (3d7 final-state configuration) in the nickel valence-band photoelectron spectrum have been identified at 13 and 18 eV binding energy with use of synchrotron radiation from the MAX storage ring. The three-hole satellites show resonances at photon energies close to the threshold for excitation of 3p53d9 core-hole shake-up states. The 13-eV satellite also shows a resonance directly at the 3p threshold. This is interpreted as an interference between the direct three-hole ionization and a shake-up transition in the Auger decay of the 3p hole. This shake-up process is also identified directly in the M2,3M4,5M4,5 Auger spectrum.
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| 7. |
- Grama, D, et al.
(author)
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Pancreatic tumors in multiple endocrine neoplasia type 1 : clinical presentation and surgical treatment
- 1992
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In: World Journal of Surgery. - 0364-2313 .- 1432-2323. ; 16:4, s. 611-618
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Journal article (peer-reviewed)abstract
- Among 33 patients with endocrine pancreatic tumors due to multiple endocrine neoplasia type 1 (MEN-1), 19 (58%) patients had hypergastrinemia, 7 (21%) patients had hyperinsulinism, and 7 (21%) patients had clinically non-functioning lesions. At least one gross tumor was found in all patients undergoing pancreatic surgery, including those with negative localization studies prior to operation. The patients also had additional macroscopic tumors as well as numerous microadenomas, and the lesions frequently were positive for immunostaining with multiple hormones, mainly pancreatic polypeptide, insulin, glucagon, and somatostatin. Duodenal endocrine lesions were found in 4 of 5 investigated patients and stained with gastrin and somatostatin antibodies. Distal, mainly subtotal pancreatic resection, was performed in 18 patients, eventually combined with caput tumor enucleation or duodenotomy, while a few patients underwent only tumor enucleation or a Whipple procedure. The long-term outcome of operation was most favorable in patients with hyperinsulinism; only 1 patient had clinical recurrence. Patients with hypergastrinemia experienced only transitory lowering of serum gastrin values after pancreatic surgery and 47% of them had or developed metastases. Such tumor spread was seen in 57% of the patients with non-functioning lesions. Nine patients died from progressive tumor disease during follow-up. Consistent with previous studies, we found that surgery is indicated in MEN-1 patients with hyperinsulinism even if a lesion is not visualized by radiology. In addition, these indications should be extended to also include patients with only biochemical markers of disease, including elevations of gastrin, as these indicate the presence of gross tumors.
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| 8. |
- Nilsson, A., et al.
(author)
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Photoabsorption and the unoccupied partial density of states of chemisorbed molecules
- 1992
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In: Chemical Physics Letters. - : Elsevier BV. - 0009-2614. ; 197:1-2, s. 12-16
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Journal article (peer-reviewed)abstract
- The 1s to 2π* resonances have been studied for CO strongly chemisorbed on Ni(100) and weakly chemisorbed on Cu(100) using high resolution X-ray absorption spectroscopy. We show that the spectra can be consistently described in terms of the local density of unoccupied 2π* electron states with the Fermi level obtained from corresponding X-ray photoelectron spectra. The core hole is demonstrated to induce large shifts in the unoccupied 2π* density of states.
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| 9. |
- Zdansky, E. O F, et al.
(author)
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Electronic structure of atomic adsorbates from x-ray-absorption spectroscopy : Threshold effects and higher excited states
- 1993
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In: Physical Review B (Condensed Matter). - 0163-1829. ; 48:4, s. 2632-2641
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Journal article (peer-reviewed)abstract
- Atomic C, N, and O chemisorbed on Ni(100) have been studied by x-ray-absorption spectroscopy. The atomic 2p orbitals are shown to form hybrid orbitals with the Ni 3d and 4sp bands. The spectral contributions from these hybrids are identified at the absorption threshold and in a region 6-12 eV above this. Between those regions, states derived from atomic 3p and higher np orbitals are observed. The threshold region shows vibrational and dynamical effects, which are discussed in connection with the corresponding photoemission spectra. The substrate Ni 2p3/2 x-ray-absorption spectrum is also presented. Its large similarity to the Ni 2p3/2 x-ray photoemission spectrum is discussed.
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