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.© 2001 The American Physical Society
DOUBLE-ELECTRON EXCITATION CHANNELS AT THE BR K-EDGE OF HBR AND BR2 / D'Angelo, Paola; Dicicco, A; Filipponi, A; Pavel, Nicolae Viorel. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - STAMPA. - 47:(1993), pp. 2055-2063. [10.1103/PhysRevA.47.2055]
DOUBLE-ELECTRON EXCITATION CHANNELS AT THE BR K-EDGE OF HBR AND BR2
D'ANGELO, Paola;PAVEL, Nicolae Viorel
1993
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.© 2001 The American Physical SocietyI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
