Disentangling formation of multiple-core holes in aminophenol molecules exposed to bright X-FEL radiation. (28th October 2015)

• Record Type: Journal Article
• Authors: Zhaunerchyk, V; Kamińska, M; Mucke, M; Squibb, R J; Eland, J H D; Piancastelli, M N; Frasinski, L J; Grilj, J; Koch, M; McFarland, B K; Sistrunk, E; Gühr, M; Coffee, R N; Bostedt, C; Bozek, J D; Salén, P; Meulen, P v d; Linusson, P; Thomas, R D; Larsson, M; Foucar, L; Ullrich, J; Motomura, K; Mondal, S; Ueda, K; Richter, R; Prince, K C; Takahashi, O; Osipov, T; Fang, L; Murphy, B F; Berrah, N; Feifel, R;
• Is Part Of: Journal of physics. Volume 48:Number 24(2015:Dec. 15)
• Publication Date: 2015-10-28
• Subjects: multiple ionization processes -- double core hole -- covariance mapping; Atoms -- Periodicals; Molecules -- Periodicals; Optics -- Periodicals; Nuclear physics -- Periodicals; 539.6
• DOI: 10.1088/0953-4075/48/24/244003
• Languages: English
• ISSNs: 0953-4075

Abstract

Abstract: Competing multi-photon ionization processes, some leading to the formation of double core hole states, have been examined in 4-aminophenol. The experiments used the linac coherent light source (LCLS) x-ray free electron laser, in combination with a time-of-flight magnetic bottle electron spectrometer and the correlation analysis method of covariance mapping. The results imply that 4-aminophenol molecules exposed to the focused x-ray pulses of the LCLS sequentially absorb more than two x-ray photons, resulting in the formation of multiple core holes as well as in the sequential removal of photoelectrons and Auger electrons (so-called PAPA sequences).