Electronic decay and fragmentation dynamics of iodomethane, multiply core-ionized by photoabsorption of intense XFEL pulses

28th International Conference on Photonic, Electronic and Atomic Collisions

Motomura, K.^1 ; Kukk, E.^1,2 ; Wada, S.^3,4 ; Nagaya, K.^4,5 ; Fukuzawa, H.^1,4 ; Mondal, S.^1 ; Tachibana, T.^1 ; Ito, Y.^1 ; Koga, R.^3 ; Sakai, T.^5 ; Matsunami, K.^5 ; Rudenko, A.^6 ; Nicolas, C.^7 ; Liu, X.-J.^7 ; Miron, C.^7 ; Zhang, Y.^8 ; Jiang, Y.H.^8 ; Chen, J.^9 ; Mailam, A.^10 ; Kim, D.^10 ; Tono, K.^11 ; Inubushi, Y.^4 ; Hatsui, T.^4 ; Yabashi, M.^4 ; Yao, M.^5 ; Ueda, K.^1,4

Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Senday

980-8577, Japan^1

Department of Physics and Astronomy, University of Turku, Turku

20014, Finland^2

Department of Physical Science, Hiroshima University, Higashi-Hiroshima

739-8256, Japan^3

RIKEN SPring-8 Center, Kouto 1-1-1, Sayo, Hyogo

679-5148, Japan^4

Department of Physics, Kyoto University, Kyoto

606-8502, Japan^5

Physics Department, Kansas State University, Manhattan

KS

66506-2601, United States^6

Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, Gif-sur-Yvette-Cedex

91192, France^7

Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai

201210, China^8

Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai

201800, China

(10) Department of Physics, CASTECH, MPC-AS. POSTECH, Pohang, Korea, Republic of

(11) Synchrotron Radiation Research Institute (JASRI), Kouto 1-1-1, Sayo, Hyogo

679-5198, Japan^9

关键词: Coincidence techniques;    Dissociation pathways;    Electronic decay;    Fragmentation dynamics;    Kinetic energy release;    Methane molecules;    Momentum correlation;    Photoabsorptions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/3/032043/pdf
DOI  :  10.1088/1742-6596/488/3/032043

来源: IOP

【 摘 要 】

We have studied charge migration and dissociation in iodine-substituted methane molecules using extremely intense and short 5.5 keV free electron laser pulses from the SACLA XFEL facility. Multiple core ionization down to I 2p subshells creates highly charged molecular states, the fragmentation of which was studied by ion momentum imaging multiparticle coincidence technique. We report experimental and modeling results on various dissociation pathways, fragment momentum correlations, and kinetic energy releases.