Eur. Phys. J. D (2012) 66: 287
https://doi.org/10.1140/epjd/e2012-30182-5

Regular Article

Photodetachment of metal cluster negative ions within many-body theory

¹ St. Petersburg State Polytechnic University, Politekhnicheskaya 29, 195251 St. Petersburg, Russia
² St. Petersburg State Maritime Technical University, Leninskii Prospect 101, 198262 St. Petersburg, Russia
³ Frankfurt Institute for Advanced Studies, Ruth-Moufang-Str. 1, 60438 Frankfurt am Main, Germany

^a e-mail: a.korol@fias.uni-frankfurt.de

Received: 16 March 2012
Received in final form: 9 July 2012
Published online: 27 November 2012

Abstract

The photodetachment cross section and photoelectron angular distribution of metal cluster negative ions are studied theoretically within the consistent many-body theory. Using the Hartree-Fock approximation for the delocalized electrons and the jellium model for the ionic core as the initial approximations, the many-electron correlations are taken into account within the Random Phase Approximation with Exchange. Our calculations demonstrate the dominant role of the many-body effects in the formation of cross sections and angular distributions of photoelectrons emitted from sodium clusters and are in good agreement with the existing experimental data. The concrete comparison of the theory and experiment has been performed for the photoionization of Na₇^-, Na₁₉^-, Na₅₇ anions with entirely closed shells of delocalized electrons.