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State-dependent fragmentation of protonated uracil and uridine

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, , Citation M Pitzer et al 2020 J. Phys.: Conf. Ser. 1412 212010 DOI 10.1088/1742-6596/1412/21/212010

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martin.pitzer@weizmann.ac.il

Author affiliations

1 Department of Chemical and Biological Physics, Weizmann Institute of Science, 76100 Rehovot, Israel

2 Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, 34132 Kassel, Germany

3 Institute for Nuclear Physics, Goethe University Frankfurt, 60438 Frankfurt, Germany

4 Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, 91192 Gif-sur-Yvette, France

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Synopsis

Protonated uracil (m/z 113) and uridine (m/z 245) were exposed to synchrotron radiation in the photon energy range of 4.5 to 9 eV. The yield of various fragments as a function of photon energy shows maxima that can be attributed to excited electronic states and compared to calculated vertical excitation energies. For the nucleoside uridine, much less fragments were observed, indicating a stabilization of the nucleobase through the attached sugar molecule.

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10.1088/1742-6596/1412/21/212010