Experiments on ''above-threshold ionization'' of atomic hydrogen

Journal Article · Tue Jul 01 04:00:00 EDT 1986 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.34.236· OSTI ID:5571775

Muller, H G; van der Wiel, M J

The multiphoton ionization of atomic hydrogen is studied by means of photoelectron spectroscopy. The order of nonlinearity of the ionization process via the 3p-italic resonance is measured for intensities in the 10/sup 11/-W/cm/sup 2/ range, revealing that the three-photon excitation step is rate limiting. What may be the first measurement on ''above-threshold ionization'' (ATI) of atomic hydrogen is reported, performed as a function of the real momentary light intensity. Agreement between the measured relative ATI yield and the theoretically predicted one is within 10%. Possibilities to extend the measurements into the regime where perturbation theory breaks down are investigated by means of a two-color experiment.

• Research Organization: FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands
• OSTI ID: 5571775
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 34:1; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
CROSS SECTIONS
ELECTROMAGNETIC RADIATION
ELECTRON SPECTRA
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY
ENERGY RESOLUTION
FLUX DENSITY
HYDROGEN
IONIZATION
IRRADIATION
LASER RADIATION
MULTI-PHOTON PROCESSES
NONMETALS
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
PULSED IRRADIATION
RADIATIONS
RESOLUTION
SPECTRA
SPECTROSCOPY
THRESHOLD ENERGY