Observation of nonsequential double ionization of helium with optical tunneling

We have measured the ion yields for helium ionized by 120 fs, 614 nm laser pulses for intensities near 10{sup 16} W/cm{sup 2}. We have found that for these ultrashort pulses the He{sup +2} data exhibit a feature which saturates in parallel with the He{sup +} signal indicating that the ionization may...

Full description

Saved in:
Bibliographic Details
Published in:Physical review letters 1992-11, Vol.69 (18), p.2642-2645
Main Authors: FITTINGHOFF, D. N, BOLTON, P. R, CHANG, B, KULANDER, K. C
Format: Article
Language:English
Subjects:
664200 - Spectra of Atoms & Molecules & their Interactions with Photons- (1992-)
ATOMIC AND MOLECULAR PHYSICS
CATIONS
CHARGED PARTICLES
DATA
ELECTROMAGNETIC RADIATION
ELEMENTS
Exact sciences and technology
EXPERIMENTAL DATA
FLUIDS
GASES
HELIUM
HELIUM IONS
INFORMATION
IONIZATION
IONS
LASER RADIATION
MATHEMATICAL MODELS
Molecular properties and interactions with photons
NONMETALS
NUMERICAL DATA
PHOTOIONIZATION
Photon interactions with molecules
Physics
PULSES
RADIATIONS
RARE GASES
RESOLUTION
SATURATION
TUNNEL EFFECT
YIELDS
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have measured the ion yields for helium ionized by 120 fs, 614 nm laser pulses for intensities near 10{sup 16} W/cm{sup 2}. We have found that for these ultrashort pulses the He{sup +2} data exhibit a feature which saturates in parallel with the He{sup +} signal indicating that the ionization may proceed nonsequentially. We propose a new mechanism, which can exist only in the tunneling regime, for such nonsequential ionization.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.69.2642