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Naslov:Effects of the molecular potential on coexcitations of valence electrons in the K-shell photoeffect of 3p and 4p elements
Avtorji:Hauko, Robert (Avtor)
Padežnik Gomilšek, Jana (Avtor)
Kodre, Alojz (Avtor)
Arčon, Iztok (Avtor)
Aquilanti, Giuliana (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:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:Photoabsorption spectra of gaseous hydrides of 3p (PH3, H2S, HCl) and 4p elements (GeH4, AsH3 , H2Se, HBr) are measured in the energy region within 50 eV above the K edge, to study coexcitations of valence electrons by photoeffect in the K shell. The analysis of the valence coexcitations is extended to Ar, Kr, and SiH4. Relative probabilities and energies of states in the individual coexcitation channels are recovered by modeling the spectral features with a minimal ansatz based on the features in the contiguous noble gas. The extracted parameters are compared to the results of theoretical calculations for molecules (ORCA code) and free atoms (Hartree-Fock code). The experimental results confirm that the valence coexcitations in the 3p and 4p hydride molecules can be satisfactorily described by a two-step process, with the shake of the outer electron following the excitation of the core electron. The total probability—relative to the K-edge jump—of the shake-up processes shows a steady decrease from 19% in Si to 14% in Cl, and from 15% in Ge to 12% in Br. The experimental values for Ar (12%) and Kr (10%) are in accord with the trend. The dominant contribution is the transition to quasiatomic orbitals, in contrast with the deeper coexcitation channels in hydride molecules where transition to molecular orbitals prevails.
Ključne besede:X-ray absorption spectra, gaseous hydrides, 3p K-edge spectra, DFT
Leto izida:2019
Št. strani:.062501-10
Številčenje:#no. #6, #Vol. #99
COBISS_ID:22395158 Povezava se odpre v novem oknu
ISSN pri članku:2469-9926
URN:URN:SI:UNG:REP:JJEJUMT5
DOI:10.1103/PhysRevA.99.062501 Povezava se odpre v novem oknu
Število ogledov:1704
Število prenosov:0
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
Področja:Gradivo ni uvrščeno v področja.
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Skupna ocena:(0 glasov)
Vaša ocena:Ocenjevanje je dovoljeno samo prijavljenim uporabnikom.

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Gradivo je del revije

Naslov:Physical review
Založnik:American Physical Society
ISSN:2469-9926
COBISS.SI-ID:2996836 Novo okno
Leto izida:2019

Sekundarni jezik

Jezik:Ni določen
Ključne besede:rentgentski žarki, absorpcijski spekter, plinski hidridi, fotoabsorpcija


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