Photoemission spectroscopy

About: Photoemission spectroscopy is a research topic. Over the lifetime, 10821 publications have been published within this topic receiving 250888 citations. The topic is also known as: photoelectron spectroscopy & PES.

Photoelectron spectroscopy and electronic structure of clusters of the group V elements. I, Dimers

Abstract: The HeI (584 A) high resolution photoelectron spectra of As+2, Sb+2, and Bi+2 have been obtained with a high temperature molecular beam source. A pure As2 beam was produced by evaporating Cu3As. Sb2 was generated as a mixture with the atoms and tetramers by evaporating the pure element, while Bi2 was generated as a mixture with only the atoms from the pure element. Vibrational structure was well resolved for the As+2 spectrum. Spectroscopic constants were derived and reported for the related ionic states. In addition, we have carried out relativistic complete active space self‐consistent field followed by multireference single + double configuration interaction calculations on these dimers both for the neutral ground states and the related ionic states. The agreements between the calculated and experimentally derived spectroscopic constants were fairly good, although the calculations tended to underestimate consistently the strength of the bonding in these heavy homonuclear diatomics.

Atomic Photoelectron Spectroscopy, Part I

Abstract: Publisher Summary This chapter explains the theoretical photoionization process and experimental techniques involved in the atomic photoelectron spectroscopy. Recently, photoionization was investigated experimentally almost entirely via photoabsorption measurements, but in the last 15 years direct observations of the ejected photoelectrons (photoelectron spectroscopy) have been made in ever-increasing numbers. The angular distribution of the photoelectrons can also be measured using photoelectron spectroscopy. The intensity of a photoelectron line is proportional to the photoionization cross section of that energy. The simplicity of wave functions consisting of single slater determinants—that is, antisymmetric products of one-electron functions can be maintained while still treating exchange correctly. Recent conference proceedings have also contained a wealth of information on the experimental methods of photoelectron spectroscopy. The proceedings of the International Conference on Electron Spectroscopy held in 1971 and the one held in 1974 contain many papers on all the phases of the experimental situation, particularly on photoelectron analysis and detection.