Time-Resolved Measurement of Interatomic Coulombic Decay Induced by Two-Photon Double Excitation of Ne2

T. Takanashi et al.
Phys. Rev. Lett. 118, 033202 – Published 19 January 2017

Abstract

The hitherto unexplored two-photon doubly excited states [Ne*(2p13s)]2 were experimentally identified using the seeded, fully coherent, intense extreme ultraviolet free-electron laser FERMI. These states undergo ultrafast interatomic Coulombic decay (ICD), which predominantly produces singly ionized dimers. In order to obtain the rate of ICD, the resulting yield of Ne2+ ions was recorded as a function of delay between the extreme ultraviolet pump and UV probe laser pulses. The extracted lifetimes of the long-lived doubly excited states, 390(130/+450)fs, and of the short-lived ones, less than 150 fs, are in good agreement with ab initio quantum mechanical calculations.

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  • Received 5 August 2016

DOI:https://doi.org/10.1103/PhysRevLett.118.033202

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

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Vol. 118, Iss. 3 — 20 January 2017

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