Near-Edge X-Ray Absorption Fine Structures Revealed in Core Ionization Photoelectron Spectroscopy
Abstract
Simultaneous core ionization and core excitation have been observed in the C2H2n (n=1, 2, 3) molecular series using synchrotron radiation and a magnetic bottle time-of-flight electron spectrometer. Rich satellite patterns corresponding to (K-2V) core excited states of the K-1 molecular ions have been identified by detecting in coincidence the photoelectron with the two Auger electrons resulting from the double core hole relaxation. A theoretical model is proposed providing absolute photoionization cross sections and revealing clear signatures of direct (monopolar) and conjugate (dipolar near-edge x-ray absorption fine structure) shakeup lines of comparable magnitude.
- Publication:
-
Physical Review Letters
- Pub Date:
- September 2013
- DOI:
- 10.1103/PhysRevLett.111.123001
- Bibcode:
- 2013PhRvL.111l3001N
- Keywords:
-
- 33.60.+q;
- 31.10.+z;
- 32.80.Aa;
- 33.70.-w;
- Photoelectron spectra;
- Theory of electronic structure electronic transitions and chemical binding;
- Inner-shell excitation and ionization;
- Intensities and shapes of molecular spectral lines and bands