Momentum Transfer Dependence of Two Types of the Broad Enhancement Phenomena: CO Spectra in the Valence Energy Region

¹Department of Physics, the Graduate School of the Chinese Academy of Sciences, PO Box 3908, Beijing 100039¹ ²Department of Physics, Center of Atomic and Molecular Nanosciences, Tsinghua University, Beijing 100084¹ ³Department of Physics, Shanghai Jiao Tong University, Shanghai 200030¹⁴Institute of Physics, Chinese Academy of Sciences, Beijing 100080

Published Date: January 31, 2004

Abstract

Partial generalized oscillator strength densities of CO molecules related to the excitation of a 5σ or 1π electron are calculated by using multi-scattering self-consistent-field methods. Momentum transfer dependence of two types of the broad enhancement phenomena above the threshold with one-electron character, i.e. shape resonance and non-resonance enhancement, is studied. Our calculations show that the energy position of a non-resonance enhancement is related to the momentum transfer K. Therefore, electron impact based experiments can be used to identify the two types of the broad enhancement phenomena.