title: Mechanisms of site-specific photochemistry following core-shell ionization of chemically inequivalent carbon atoms in acetaldehyde (ethanal).
abstract: Site-specific fragmentation upon 1s photoionisation of acetaldehyde has been studied using synchrotron radiation and a multi-electron-ion coincidence technique based on a magnetic bottle. Experimental evidence is presented that bond rupture occurs with highest probability in the vicinity of the initial charge localisation and possible mechanisms are discussed. We find that a significant contribution to site-specific photochemistry is made by different fragmentation patterns of individual quantum states populated at identical ionisation energies.
authors: Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden.
authors: Sergey
authors: S
authors: Zagorodskikh
authors: Department of Physics, University of Gothenburg, Origovägen 6B, SE-412 96 Gothenburg, Sweden.
authors: John H D
authors: JH
authors: Eland
authors: Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden.
authors: Vitali
authors: V
authors: Zhaunerchyk
authors: Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden.
authors: Melanie
authors: M
authors: Mucke
authors: Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden.
authors: Richard J
authors: RJ
authors: Squibb
authors: Department of Physics, Stockholm University, AlbaNova University Center, SE-106 91 Stockholm, Sweden.
authors: Per
authors: P
authors: Linusson
authors: Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden.
authors: Raimund
authors: R
authors: Feifel