Above-threshold dissociation of H sup + sub 2 in intense laser fields

Journal Article · Mon Jan 29 04:00:00 EST 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.515· OSTI ID:7134919

Giusti-Suzor, A; He, X; Atabek, O ^[1]; Mies, F H ^[2]

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1. Laboratoire de Photophysique Moleculaire, Universite Paris-Sud, 91405 Orsay, France (FR)
2. National Institute of Standards Technology, Gaithersburg, Maryland 20899 (USA)

We present nonperturbative, time-independent calculations of the photodissociation rate of H{sup +}{sub 2} in intense laser fields. The energy distribution of the protons consists in a sequence of peaks evenly spaced by half the photon energy, all of equal width but of varying heights. They result from multiphoton absorption above the dissociation threshold, with equal sharing of the excess photon energy between H and H{sup +}. Surprisingly, the distribution of higher-energy peaks decreases with increasing intensity, due to stimulated free-free emission of the dissociating fragments. We also predict a sharp angular distribution of the protons along the electric field vector of a linearly polarized laser.

• OSTI ID: 7134919
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 64:5; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
ANGULAR DISTRIBUTION
BARYONS
CATIONS
CHARGED PARTICLES
DISSOCIATION
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY
ENERGY ABSORPTION
ENERGY LEVELS
ENERGY SPECTRA
EXCITED STATES
FERMIONS
FUNCTIONS
GROUND STATES
HADRONS
HYDROGEN IONS
IONS
MULTI-PHOTON PROCESSES
NUCLEONS
POTENTIAL ENERGY
PROTONS
SPECTRA
THRESHOLD ENERGY
TIME DEPENDENCE
TUNNEL EFFECT
VIBRATIONAL STATES
WAVE FUNCTIONS