Angular distributions of photoelectrons from multiresonant ionization of atomic hydrogen at 608 nm

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · Journal of the Optical Society of America, Part B: Optical Physics; (USA)

DOI:https://doi.org/10.1364/JOSAB.7.000463· OSTI ID:6851145

Gontier, Y; Trahin, M ^[1]

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1. Service de Physique des Atomes et des Surfaces, Centre d'Etudes Nucleaires de Saclay, 91191 Gif-sur-Yvette Cedex, France (FR)

An all-order multiphoton resonant theory is presented within the resolvent formalism. Previous operator expressions obtained in the single-resonance case are generalized to multiresonance problems. The theory is applied to the calculation of angular distributions of photoelectrons arising from the ionization of hydrogen by a realistic light pulse of 0.7-psec duration at 608 nm. For intensities greater than 1.9 {times} 10{sup 13} W/cm{sup 2}, the computation shows that we have not a seven- but an eight-photon ionization process. The ac Stark shift of atomic levels generates induced resonances above the atomic ionization limit. The effect of such resonances on the angular distributions of photoelectrons is discussed. The inspection of the total electron yield proves that the {ital F}-state resonances prevail over the {ital P}-state ones.

• OSTI ID: 6851145
• Journal Information: Journal of the Optical Society of America, Part B: Optical Physics; (USA), Journal Name: Journal of the Optical Society of America, Part B: Optical Physics; (USA) Vol. 7:4; ISSN JOBPD; ISSN 0740-3224
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
ATOMS
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY LEVELS
F STATES
HYDROGEN
IONIZATION
LASER RADIATION
MULTI-PHOTON PROCESSES
NONMETALS
P STATES
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
POWER
POWER RANGE 01-10 TW
PULSES
QUANTUM ELECTRONICS
RADIATIONS
RESONANCE
SPECTRAL SHIFT
SPECTROSCOPY
STARK EFFECT
VISIBLE RADIATION
YIELDS