학술논문
Investigating charge-up and fragmentation dynamics of oxygen molecules after interaction with strong X-ray free-electron laser pulses
Document Type
article
Author
Kastirke, G; Ota, F; Rezvan, DV; Schöffler, MS; Weller, M; Rist, J; Boll, R; Anders, N; Baumann, TM; Eckart, S; Erk, B; De Fanis, A; Fehre, K; Gatton, A; Grundmann, S; Grychtol, P; Hartung, A; Hofmann, M; Ilchen, M; Janke, C; Kircher, M; Kunitski, M; Li, X; Mazza, T; Melzer, N; Montano, J; Music, V; Nalin, G; Ovcharenko, Y; Pier, A; Rennhack, N; Rivas, DE; Dörner, R; Rolles, D; Rudenko, A; Schmidt, Ph; Siebert, J; Strenger, N; Trabert, D; Vela-Perez, I; Wagner, R; Weber, Th; Williams, JB; Ziolkowski, P; Schmidt, L Ph H; Czasch, A; Tamura, Y; Hara, N; Yamazaki, K; Hatada, K; Trinter, F; Meyer, M; Ueda, K; Demekhin, Ph V; Jahnke, T
Source
Physical Chemistry Chemical Physics. 24(44)
Subject
Language
Abstract
During the last decade, X-ray free-electron lasers (XFELs) have enabled the study of light-matter interaction under extreme conditions. Atoms which are subject to XFEL radiation are charged by a complex interplay of (several subsequent) photoionization events and electronic decay processes within a few femtoseconds. The interaction with molecules is even more intriguing, since intricate nuclear dynamics occur as the molecules start to dissociate during the charge-up process. Here, we demonstrate that by analyzing photoelectron angular emission distributions and kinetic energy release of charge states of ionic molecular fragments, we can obtain a detailed understanding of the charge-up and fragmentation dynamics. Our novel approach allows for gathering such information without the need of complex ab initio modeling. As an example, we provide a detailed view on the processes happening on a femtosecond time scale in oxygen molecules exposed to intense XFEL pulses.