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Complete reconstruction of bound and unbound electronic wavefunctions in two-photon double ionization

By controlling the polarization of the VUV–XUV light from the FERMI, the bound and continuum components of the system in the first and second ionization steps leading to the formation of doubly charged neon ions have been determined. P. Carpeggiani et al. Nature Physics (2018) doi: 10.1038/s41567-018-0340-4

 
The advent of free-electron lasers (FELs) operating in the XUV and X-ray spectral range has opened new possibilities for the investigation of the formation of multiply charged ions in a laboratory environment. Due to the high intensity of FEL pulses, an initial target can absorb several XUV/X-ray photons, leading to the (sequential) emission of multiple photoelectron wavepackets. The three-dimensional photoelectron angular distribution (PAD) of the electron(s) released into the continuum is the result of the coherent superposition of several outgoing electron partial waves, characterized by different angular momenta.
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Carpeggiani Paolo Antonio, Gryzlova Elena, Reduzzi Maurizio, Dubrouil Antoine, Facciala' Davide, Negro Matteo, Ueda Kiyoshi, Burkov S M, Frassetto Fabio, Stienkemeier Frank, Ovcharenko Yevheniy, Meyer Michael, Plekan Oksana, Finetti Paola, Prince Kevin Charles, Callegari Carlo, Grum-Grzhimailo Alexei, Sansone Giuseppe 
Nature Physics (2018) 
doi: 10.1038/s41567-018-0340-4

Last Updated on Monday, 19 November 2018 11:50