We report the direct measurement by x-ray-absorption spectroscopy of the complete spectrum of multielectron excitations at the Br- K edge. Measurements of crystalline tetramethylammonium bromide were made at 30 K and room temperature. The latter spectrum has been found to be largely dominated by the opening of multielectron excitation channels, thus providing a very good model of the Br- atomic background which can be used in the analysis of ionic bromine compounds. The complete sequence of multielectron transitions has been clearly identified and compared with theoretical determinations. A direct experimental determination of the [1s4p] double-electron excitation channel has been performed at the Br- K edge.
Complete spectrum of multielectron excitations at the Br- K edge x-ray absorption spectra / D'Angelo, Paola; Pavel, Nicolae Viorel. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 64:(2001), pp. 2331121-2331124. [10.1103/PhysRevB.64.233112]
Complete spectrum of multielectron excitations at the Br- K edge x-ray absorption spectra
D'ANGELO, Paola;PAVEL, Nicolae Viorel
2001
Abstract
We report the direct measurement by x-ray-absorption spectroscopy of the complete spectrum of multielectron excitations at the Br- K edge. Measurements of crystalline tetramethylammonium bromide were made at 30 K and room temperature. The latter spectrum has been found to be largely dominated by the opening of multielectron excitation channels, thus providing a very good model of the Br- atomic background which can be used in the analysis of ionic bromine compounds. The complete sequence of multielectron transitions has been clearly identified and compared with theoretical determinations. A direct experimental determination of the [1s4p] double-electron excitation channel has been performed at the Br- K edge.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
