%0 Journal Article
%A Hauko, R.
%A Padežnik Gomilšek, J.
%A Kodre, A.
%A Arčon, I.
%A Aquilanti, G.
%T Effects of the molecular potential on coexcitations of valence electrons in the K-shell photoeffect of 3p and 4p elements
%J Physical review / A
%V 99
%N 6
%@ 2469-9926
%C Woodbury, NY
%I APS
%M PUBDB-2019-03227
%P 062501
%D 2019
%X Photoabsorption spectra of gaseous hydrides of 3p(PH<sub>3</sub>,H<sub>2</sub>S, HCl) and 4p elements (GeH<sub>4</sub>,AsH<sub>3</sub>,H<sub>2</sub>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<sub>4</sub>.  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
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000470817900003
%R 10.1103/PhysRevA.99.062501
%U https://bib-pubdb1.desy.de/record/425412