One-photon multielectron excitation in copper

Autor:	Alok Kumar, S. I. Salem
Rok vydání:	1986
Předmět:	Physics Cross section (physics) Photon Absorption edge Absorption spectroscopy chemistry chemistry.chemical_element Atomic physics Classification of discontinuities Absorption (electromagnetic radiation) Copper Atomic and Molecular Physics and Optics Excitation
Zdroj:	Journal of Physics B: Atomic and Molecular Physics. 19:73-78
ISSN:	0022-3700
DOI:	10.1088/0022-3700/19/1/013
Popis:	The X-ray absorption spectrum of copper was studied using two different experimental techniques. Discontinuities with energies corresponding to the double excitation 1s-- and to the triple excitation 1s--+2s- and 1s--+2p- were observed and studied. The magnitudes of these discontinuities were compared with that of the K absorption edge of the element, to determine the cross section for the simultaneous creation of two and three electronic vacancies, resulting from the absorption of a single X-ray photon. These were only a fraction of one per cent of the 1s- single-electron cross section. The measured energies of the observed discontinuities are in good agreement with the results obtained on the basis of Hartree-Fock calculations for the corresponding multielectron excitations and fall within the limits of the uncertainties in the final results.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2b3a32e24104e614c55fe4d538979945 https://doi.org/10.1088/0022-3700/19/1/013 Zobrazit plný text záznamu