Open AccessHigh-Energy Cutoff in the Spectrum of Strong-Field Nonsequential Double Ionization
Author(s) -
Jonathan Parker,
B. Doherty,
K. T. Taylor,
K. D. Schultz,
Cosmin I. Blaga,
Louis F. DiMauro
Publication year - 2006
Publication title -
physical review letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.688
H-Index - 673
eISSN - 1079-7114
pISSN - 0031-9007
DOI - 10.1103/physrevlett.96.133001
Subject(s) - double ionization , atomic physics , cutoff , physics , ionization , helium , energy (signal processing) , electron , field (mathematics) , laser , electron ionization , nuclear physics , ion , optics , quantum mechanics , mathematics , pure mathematics
Electron energy distributions of singly and doubly ionized helium in an intense 390 nm laser field have been measured at two intensities (0.8 PW/cm2 and 1.1 PW/cm2, where PW is defined as 10(15) W/cm2). Numerical solutions of the full-dimensional time-dependent helium Schrödinger equation show excellent agreement with the experimental measurements. The high-energy portion of the two-electron energy distributions reveals an unexpected 5U(p) cutoff for the double ionization (DI) process and leads to a proposed model for DI below the quasiclassical threshold.
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