Regular Article

The effect of elliptical polarization in MSXα calculations of the molecular-frame photoelectron angular distributions of CO C(1s) ionization^⋆

¹ Physics Faculty, St. Petersburg State University, 198504 St. Petersburg, Russia
² Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany
³ Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany
⁴ Center for Ultrafast Imaging, Universität Hamburg, 22761 Hamburg, Germany
⁵ Department of Physics, Universität Hamburg, 22761 Hamburg, Germany
⁶ J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS 66506, USA

^a e-mail: golovin50@mail.ru

Received: 30 September 2018
Received in final form: 21 March 2019
Published online: 2 July 2019

Abstract

We present a theoretical investigation of the molecular-frame photoelectron angular distribution (MF-PAD) resulting from the inner-shell photoionization of fixed-in-space CO molecules with elliptically polarized light. The MSXα output program, originally written for linearly polarized light, was changed in order to calculate the MF-PAD for circularly and elliptically polarized light. The calculations were made for CO C(1s) inner-shell photoionization for 3, 10, and 30 eV kinetic energy electrons. The MF-PADs were calculated from 0° angle of ellipticity (equivalent to linear polarized light parallel to the molecular axis) in steps of 5° (corresponding to different types of elliptical light) up to 90° (equivalent to linear polarized light perpendicular to the molecular axis).