Anion Mass Spectrometry Study of Ion-Pair Photodissociation of CO2 in the XUV Energy 19.70–22.24 eV

Abstract

We demonstrate anion mass spectrometry using the Hefei synchrotron radiation source to investigate the ion-pair dissociation processes of molecules. The efficiency curve of the O− anionic product via ion-pair dissociations of CO2 is recorded with tunable extreme vacuum ultraviolet photons (energy: 19.70–22.24 eV) and compared with the spectrum available in the literature. The possible dynamics of CO2 + hv → CO+ + O− in this energy range is discussed.