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| Home > Publications database > Time-Resolved Measurement of Interatomic Coulombic Decay Induced by Two-Photon Double Excitation of Ne 2 |
| Journal Article | PUBDB-2017-10782 |
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2017
APS
College Park, Md.
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Please use a persistent id in citations: doi:10.1103/PhysRevLett.118.033202 doi:10.3204/PUBDB-2017-10782
Abstract: The hitherto unexplored two-photon doubly excited states [Ne*$(2p−^13s)]_2$ were experimentallyidentified using the seeded, fully coherent, intense extreme ultraviolet free-electron laser FERMI. Thesestates undergo ultrafast interatomic Coulombic decay (ICD), which predominantly produces singly ionizeddimers. In order to obtain the rate of ICD, the resulting yield of $Ne^+_2$ ions was recorded as a function ofdelay 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 goodagreement with $ab$ $initio$ quantum mechanical calculations.
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