The XeI anion and the corresponding neutral X1/2, I3/2, and II1/2 electronic states have been studied by means of zero electron kinetic energy ~ZEKE! and photoelectron spectroscopy. The ZEKE spectra show rich and well-resolved progressions in the low-frequency vibrations of the anion and the neutral van der Waals complexes. From our spectroscopic data we construct model potentials for the anion...

The high-resolution photoelectron spectrum of ArO(-) was obtained using slow electron velocity-map imaging (SEVI). The SEVI spectrum reveals well-resolved vibrational transitions between multiple electronic states of ArO(-) and ArO, both of which are open-shell species. These transitions occur within the broad envelope of previous lower resolution photoelectron spectra. Detailed assignments are...

Theoretical calculations by Khanna and Jena predicted KAl(13) to be an ionically bonded, cluster-assembled "diatomic molecule," i.e., K(+)Al(13) (-). We have conducted both mass spectral and anion photoelectron spectroscopic studies on KAl(n) (-), finding a "dip" at n=13 in both their mass spectrum and in their electron affinity versus n trend. While these largely qualitative results are consis...

In this paper, we provide detailed insights into the electronic structure of the gas phase biphenylene molecule through core and valence spectroscopy. By comparing results of X-ray Photoelectron Spectroscopy (XPS) measurements with ΔSCF core-hole calculations in the framework of Density Functional Theory (DFT), we could decompose the characteristic contributions to the total spectra and assign ...

We have recorded the 35 1 nm photoelectron spectra of Bi; , Bi; , and Bi; . The spectrum of Bi; shows transitions to at least seven electronic states of Bi, neutral, four of which are observed with vibrational resolution. Term energies, bond lengths, and vibrational frequencies are obtained for the anion ground state and for the first three excited states of Bi, . These results are compared to ...

Anion photoelectron spectra are presented for the halide-acetylene complexes, X– · · · C2H2 where X = Cl, Br, and I. Electron binding energies are determined to be 4.1, 3.8 and 3.4 eV respectively. Results from CCSD(T) calculations are presented for the neutral halogen-acetylene complexes. Two minima are predicted corresponding to a linear C∞v and T-shaped C2v geometry, with the T-shaped geomet...

X-Ray photoelectron spectroscopy has been extended to colloidal nanoparticles in aqueous solution using a liquid microjet in combination with synchrotron radiation, which allowed for depth-dependent measurements. Two distinct electronic structures are evident in the Si 2p photoelectron spectrum of 7 nm SiO(2)-nanoparticles at pH 10. A core-shell model is proposed where only the outermost layer ...

We report high resolution photoelectron imaging spectra of Cu and Cu (H2O)n (n = 1,2) complexes. With the least bound electron principally localized on the metal, electron photodetachment produces neutral states that are best characterized by the atomic metal state plus a water molecule: [Cu (S), H2O], [Cu ( D5/2), H2O], and [Cu ( D3/2), H2O]. The large Cu –H2O separation gives rise to a remark...

The molecular anions, Li(3)O(-) and Na(3)O(-) were produced by laser vaporization and studied via anion photoelectron spectroscopy. Li(3)O(-) and Na(3)O(-) are the negative ions of the super-alkali neutral molecules, Li(3)O and Na(3)O. A two-photon process involving the photodetachment of electrons from the Li(3)O(-) and Na(3)O(-) anions and the photoionization of electrons from the resulting L...

The spectrum of a photoexcited electron pair carries detailed information on the electron-electron interaction in metals. This is deduced from the results of a theoretical model presented here for the treatment of the double-photoelectron emission from surfaces. Main features in the two-particle spectra are assigned to (a) the exchange-correlation interaction, (b) the electronic band structure,...