Circular dichroism in photoionization of H2

ABSTRACT: Circular dichroism is a consequence of chirality. However, nonchiral molecules can also exhibit it when the measurement itself introduces chirality, e.g., when measuring molecular-frame photoelectron angular distributions. The few such experiments performed on homonuclear diatomic molecules show that, as expected, circular dichroism vanishes when the molecular-frame photoelectron angular distributions are integrated over the polar electron emission angle. Here we show that this is not the case in resonant dissociative ionization of H2 for photons of 30–35 eV, which is the consequence of the delayed ionization from molecular doubly excited states into ionic states of different inversion symmetry.

• Autores: Dowek, D.; Pérez Torres, Jhon Fredy; Picard, Y. J.; Billaud, P.; Elkharrat, C.; Houver, J. C.; Sanz Vicario, José Luis; Martín García, Fernando
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2010
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/9329
• Acceso en línea: http://hdl.handle.net/10495/9329
• Palabra clave: Dicroísmo circular; Circular Dichroism; Espectroscopía de Fotoelectrones; Photoelectron Spectroscopy; Dicroismo Circular; Circular Dichroism; Resonancia; Resonance; moléculas diatómicas
• Rights: openAccess
• License: http://creativecommons.org/licenses/by-nc-nd/2.5/co/