Interferece of Two Shape Resonances Probed by Rescattering Photoelectron Spectroscopy of CO2

28th International Conference on Photonic, Electronic and Atomic Collisions

Okunishi, Misaki^1 ; Lucchese, Robert R.^1,2 ; Morishita, Toru^3 ; Ueda, Kiyoshi^1

Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai

980-8577, Japan^1

Department of Chemistry, Texas A and M University, College Station

TX

77843-3255, United States^2

Department of Engineering Science, University of Electro-Communications, Chofu, Tokyo

182-8585, Japan^3

关键词: Continuum state;    Different shapes;    Differential cross section;    Electron-ion scattering;    Intense femtosecond laser pulse;    Photoelectron spectrum;    Potential barriers;    Theoretical calculations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/3/032024/pdf
DOI  :  10.1088/1742-6596/488/3/032024

来源: IOP

【 摘 要 】

Footprint of shape resonance is observed in angle-resolved rescattering photoelectron spectra (RPS) of CO2induced by intense femtosecond laser pulses. The rescattering spectra are compared with theoretical calculations of the differential cross sections (DCSs) of electron scattering by CO+2. The RPS and DCSs show a clear dip where collision momentum of electron is around 1.2 atomic unit. This dip is interpreted theoretically as the interference of two different shape resonances, where electrons in the continuum states are trapped by the potential barrier of the electron-ion scattering potential.