UV-visible emission as a probe of core excitations applied to the furan and carbon dioxide molecules

7 pags, 4 figs- -- 14th International Conference on X-Ray Absorption Fine Structure (XAFS14), Camerino, Italy, July 26-31, 2009The core excitations of the furan and carbon dioxide molecules have been studied using dispersed UV-visible fluorescence spectroscopy. Balmer-α (Balmer-β) emission was measured at the O 1s and C 1s (O 1s) excitations of furan, while emission due to an excited state of the neutral oxygen atom was measured at the O 1s excitations of CO2. The excitation functions of the emission lines display both valence and Rydberg resonances, but the latter are more enhanced. © 2009 IOP Publishing Ltd.Peer reviewe

New Fragmentation Pathways in K-THF Collisions as Studied by Electron Transfer Experiments: Negative Ion Formation

Time-of-flight (TOF) negative ion mass spectra have been obtained in collisions of 20−100 eV neutral potassium atoms with tetrahydrofuran (C4H8O), an analogue for the sugar unit in DNA/RNA. Major enhancements in O− and C2H3O− production were observed compared with earlier dissociative electron attachment (DEA) experiments. In further contrast with DEA, no evidence was observed for dehydrogenated parent anions, and three new fragment anions were detected: CH−, C2−, and C2H−. These contrasting results for potassium impact and DEA highlight significant differences in the reaction pathways initiated by the two electron delivery processes

Absolute elastic cross-sections for low-energy electron scattering from tetrahydrofuran

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