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@ARTICLE{Hauko:425412,
author = {Hauko, R. and Padežnik Gomilšek, J. and Kodre, A. and
Arčon, I. and Aquilanti, G.},
title = {{E}ffects of the molecular potential on coexcitations of
valence electrons in the ${K}$-shell photoeffect of $3p$ and
$4p$ elements},
journal = {Physical review / A},
volume = {99},
number = {6},
issn = {2469-9926},
address = {Woodbury, NY},
publisher = {APS},
reportid = {PUBDB-2019-03227},
pages = {062501},
year = {2019},
abstract = {Photoabsorption spectra of gaseous hydrides of
$3p(PH_{3},H_{2}S, HCl)$ and $4p$ elements
$(GeH_{4},AsH_{3},H_{2}Se,HBr)$ are measured in the energy
region within 50 eV above the $K$ edge, to study
coexcitations of valenceelectrons by photoeffect in the $K$
shell. The analysis of the valence coexcitations is extended
to Ar, Kr, and $SiH_4$. Relative probabilities and energies
of states in the individual coexcitation channels are
recovered bymodeling the spectral features with a minimal
ansatz based on the features in the contiguous noble gas.
Theextracted parameters are compared to the results of
theoretical calculations for molecules (ORCAcode) andfree
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 electronfollowing the
excitation of the core electron. The total
probability—relative to the $K$-edge jump—of the
shake-upprocesses shows a steady decrease from 19\% in Si to
14\% in Cl, and from 15\% in Ge to 12\% in Br.
Theexperimental values for Ar (12\%) and Kr (10\%) are in
accord with the trend. The dominant contribution isthe
transition to quasiatomic orbitals, in contrast with the
deeper coexcitation channels in hydride moleculeswhere
transition to molecular orbitals prevails.},
cin = {DOOR},
ddc = {530},
cid = {I:(DE-H253)HAS-User-20120731},
pnm = {6G3 - PETRA III (POF3-622) / FS-Proposal: I-20180356 EC
(I-20180356-EC) / CALIPSOplus - Convenient Access to Light
Sources Open to Innovation, Science and to the World
(730872)},
pid = {G:(DE-HGF)POF3-6G3 / G:(DE-H253)I-20180356-EC /
G:(EU-Grant)730872},
experiment = {EXP:(DE-H253)P-P65-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000470817900003},
doi = {10.1103/PhysRevA.99.062501},
url = {https://bib-pubdb1.desy.de/record/425412},
}