We report the direct measurement by x-ray-absorption spectroscopy of the complete spectrum of multielectron excitations at the I− K edge. The photoabsorption cross section of crystalline tetramethylammonium iodide was measured at 28, 50, and 150 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 I− atomic background which can be used in the analysis of ionic iodine compounds. Features due to the simultaneous excitations 1s5p, 1s5s, 1s4d, 1s4p, 1s4s, 1s3d, and 1s3p have been recognized, and their identification is supported by previous experimental and theoretical determinations on Xe and HI.
Measurement of x-ray multielectron photoexcitations at the I- K edge / D'Angelo, Paola; Zitolo, Andrea; Migliorati, Valentina; Pavel, Nicolae Viorel. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 78:(2008), pp. 144105-1-144105-6. [10.1103/PhysRevB.78.144105]
Measurement of x-ray multielectron photoexcitations at the I- K edge
D'ANGELO, Paola;ZITOLO, ANDREA;MIGLIORATI, VALENTINA;PAVEL, Nicolae Viorel
2008
Abstract
We report the direct measurement by x-ray-absorption spectroscopy of the complete spectrum of multielectron excitations at the I− K edge. The photoabsorption cross section of crystalline tetramethylammonium iodide was measured at 28, 50, and 150 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 I− atomic background which can be used in the analysis of ionic iodine compounds. Features due to the simultaneous excitations 1s5p, 1s5s, 1s4d, 1s4p, 1s4s, 1s3d, and 1s3p have been recognized, and their identification is supported by previous experimental and theoretical determinations on Xe and HI.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
