Double K-shell ionization in C2H2n(n=l,3), CO and N2

28th International Conference on Photonic, Electronic and Atomic Collisions

Nakano, M.^1,2 ; Penent, F.^3,4 ; Tashiro, M.^5 ; Grozdanov, T.P.^6 ; Itnik, M.^7 ; Carniato, S.^3,4 ; Selles, P.^3,4 ; Andric, L.^3,4 ; Lablanquie, P.^3,4 ; Palaudoux, J.^3,4 ; Shigemasa, E.^5 ; Iwayama, H.^5 ; Hikosaka, Y.^8 ; Soejima, K.^8 ; Suzuki, I.H.^1 ; Kouchi, N.^2 ; Ito, K.^1

Photon Factory, Institute of Materials Structure Science, Oho, Tsukuba

305-0801, Japan^1

Department of Chemistry, Tokyo Institute of Technology, O-okayama, Tokyo

152-8551, Japan^2

UPMC, Université Paris 06, LCPMR, 11 rue Pierre et Marie Curie, Paris Cedex 05

75231, France^3

CNRS, LCPMR (UMR 7614), 11 rue Pierre et Marie Curie, Paris Cedex 05

75231, France^4

Institute for Molecular Science, Okazaki

444-8585, Japan^5

Institute of Physics, University of Belgrade, Pregrevica118, Belgrade

11080, Serbia^6

Joef Stefan Institute, P. O. Box 3000, Ljubljana

SI-1001, Slovenia^7

Department of Environmental Science, Niigata University, Niigata

950-2181, Japan^8

关键词: CO molecule;    K-shell ionization;    Knock outs;    Neighbor atoms;    Single photons;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/2/022013/pdf
DOI  :  10.1088/1742-6596/488/2/022013

来源: IOP

【 摘 要 】

We have observed single photon one-site (K-2) and two-sites (K-1K-1) double K-shell ionization in C2H2n(n=1-3) sequence and in isoelectronic C2H2, N2and CO molecules. The spectroscopy of K-1K-1states is much more sensitive to the bond length than conventional ESCA spectroscopy based on single K-shell ionization. The mechanism of single photon two-sites is due to a knock-out process in which a primary photoionized 1s electrons eject another 1s electron on the neighbor atom.