Repozitorij Univerze v Novi Gorici

Izpis gradiva
A+ | A- | SLO | ENG

Naslov:Photoexcitation processes in atoms
Avtorji:Kodre, Alojz (Avtor)
Arčon, Iztok (Avtor)
Padežnik Gomilšek, Jana (Avtor)
Datoteke:Gradivo nima datotek. Gradivo je morda fizično dosegljivo v knjižnici fakultete, zalogo lahko preverite v COBISS-u. Povezava se odpre v novem oknu
Jezik:Angleški jezik
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.16 - Samostojni znanstveni sestavek ali poglavje v monografski publikaciji
Organizacija:UNG - Univerza v Novi Gorici
Opis:Photoelectric absorption is characterized by a smooth power-law decrease of the cross section with photon energy. Absorption edges reveal rich structure, which continues into the high-energy side. The quasiperiodic signal, superposed onto the smooth basis, due to scattering of the photoelectron on the neighbours of the target atom provides the basis for the structural (XAFS) analysis of the material. Irregular tiny resonances and edges that appear over the same general range as XAFS are recognized as intra-atomic effects: multielectron excitations (MEE) owing to correlated motion in the electronic cloud. The systematic study of MEE began on noble gases and metallic vapours, both of which are gases of free atoms. With some extremely strong MEE, mostly coexcitations of the subvalence d and f electrons, the structural XAFS analysis may be compromised; hence, there is a need to independently determine the MEE signal, the atomic absorption background (AAB) for the analyzed element, and remove it prior to analysis. In view of the scarcity of elements which can practically be prepared in a free-atom gas state, several approaches to approximate the AAB have been developed: analysis of disordered compounds, where the weak and simple XAFS signal can be modelled and removed, and correlation analysis of the absorption spectra of several independent samples, where the AAB is extracted in an iterative procedure.
Ključne besede:photoexcitation, XAFS, multielectron excitations, atomic absorption background
Leto izida:2021
Št. strani:5
Številčenje:1, 1
COBISS_ID:89611267  Povezava se odpre v novem oknu
URN:URN:SI:UNG:REP:BDYIG1GF
DOI:https://doi.org/10.1107/S1574870720003511 Povezava se odpre v novem oknu
Število ogledov:600
Število prenosov:0
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
Področja:Gradivo ni uvrščeno v področja.
:
  
Skupna ocena:(0 glasov)
Vaša ocena:Ocenjevanje je dovoljeno samo prijavljenim uporabnikom.

Postavite miškin kazalec na naslov za izpis povzetka. Klik na naslov izpiše podrobnosti ali sproži prenos.

Gradivo je del zbornika

Naslov:X-ray absorption spectroscopy and related techniques
COBISS.SI-ID:89610755 Novo okno

Gradivo je del revije

Naslov:International Tables of Crystalography Vol I.
Skrajšan naslov:Int. Tables Crystallogr. I
Založnik:International Union of Crystallography
ISSN:1574-8707

Nazaj