Abstract
Metastable ion transitions are investigated, with benzene as an example, using reflectron mass spectrometry and synchrotron radiation. Photoelectron—photoion coincidence (PEPICO) spectra contained two types of metastable peaks, m * and m ** . These are shown to be due to dissociation in the dirft tube and the electrostatic mirror section respectively through the use of double and triple coincidence measurements between photoelectrons, photoneutrals and photoions. The combined results enabled precursor ions to be assigned in both single-step and sequential fragmentations. The results confirmed previous analyses of benzene metastable transitions induced by electron excitation. The evolution of product ion yields, and the ratio of metastable to fast dissociation reactions, as a function of photon excitation energy are rationalized in terms of the internal energy deposited in the parent cation.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: International Journal of Mass Spectrometry and Ion Processes
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.