The role of intramolecular scattering in K-shell photoionization

28th International Conference on Photonic, Electronic and Atomic Collisions

Ayuso, D.^1 ; Ueda, K.^2 ; Miron, C.^3 ; Plésiat, E.^1 ; Argenti, L.^1 ; Patanen, M.^3 ; Kooser, K.^4 ; Mondal, S.^2 ; Kimura, M.^2 ; Sakai, K.^2 ; Travnikova, O.^3 ; Palacios, A.^1 ; Decleva, P.^5 ; Kukk, E.^4 ; Martín, F.^1,6

Departamento de Química, Universidad Autónoma de Madrid Cantoblanco, Módulo 13, Madrid

28049, Spain^1

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

980-8577, Japan^2

Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, Gif-sur-Yvette cedex

91192, France^3

Department of Physics and Astronomy, University of Turku, Turku

20014, Finland^4

Dipartimento di Scienze Chimiche, Università di Trieste, CNR-IOM, Trieste

34127, Italy^5

Instituto Madrileño de Estudios Avanzados en Nanociencia, Cantoblanco, Madrid

28049, Spain^6

关键词: Atomic centers;    Inner shell photoionization;    Intramolecular scattering;    K-shell photoionization;    Photon energy;    Polyatomic molecules;    Small molecules;    Vibrationally resolved;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/2/022023/pdf
DOI  :  10.1088/1742-6596/488/2/022023

来源: IOP

【 摘 要 】

We report evidence of intramolecular scattering occurring in inner shell photoionization of small molecules. Pronounced oscillations of the ratios between vibrationally resolved cross sections (v-ratios) as a function of photon energy have been observed theoretically and experimentally. Qualitative agreement with a 1st Born model confirms that they are due to intramolecular scattering: when an electron is ejected from a very localized region in the center of a polyatomic molecule, such as the C(1s) orbital in a CF4molecule, it is diffracted by the surrounding atomic centers, encoding the geometry of the molecule [1, 2].