On the simplest presentation of the molecular frame photoelectron angular distributions for core levels

• Published in: Journal of physics. B, Atomic, molecular, and optical physics Vol. 42; no. 8; p. 085101
• Main Authors: Semenov, S K, Cherepkov, N A
• Format: Journal Article
• Language: English
• Published: IOP Publishing 28.04.2009
• ISSN: 0953-4075; 1361-6455
• DOI: 10.1088/0953-4075/42/8/085101

It is shown that four two-dimensional angular distributions of photoelectrons ejected from core levels of fixed-in-space linear molecules constitute a minimal set sufficient to reproduce any three-dimensional angular distribution for arbitrary light polarization and for arbitrary direction of the light beam relative to the molecular axis in the dipole approximation. Experimentally these four two-dimensional angular distributions can be measured by varying the light polarization in a fixed experimental geometry in which the light beam is directed perpendicular to the molecular axis, and photoelectrons are detected in the plane perpendicular to the light beam. At the same time these measurements are sufficient to perform the complete quantum-mechanical experiment for the photoionization of K-shells of linear molecules.