Ionization and double excitation of helium by short intense laser pulses

Journal Article · Tue Jul 01 04:00:00 EDT 1997 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.56.R13· OSTI ID:531790

Scrinzi, A ^[1]; Piraux, B ^[2]

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1. Institut fuer Theoretische Physik, Universitaet Innsbruck, Technikerstrasse 25, A-6020 Innsbruck (Austria)
2. Institut de Physique, Universite Catholique de Louvain, 2, Chemin du Cyclotron, B-1348 Louvain-la-Neuve (Belgium)

We present an {ital ab initio} calculation of single ionization, harmonic generation, and double excitation of helium by short (3.8{endash}15.2 fs) moderately strong (peak intensity 1.49{times}10{sup 14}W/cm{sup 2}) laser pulses with wavelengths between 40 and 152 nm. We find excitation to be dominated by resonances with bound and doubly excited states. The processes are nonperturbative. The finite pulse duration leads to resonance broadening and far-off-resonant transitions. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 531790
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 1 Vol. 56; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
EXCITATION
EXCITED STATES
HARMONIC GENERATION
HELIUM
LASER RADIATION
PHOTOIONIZATION
PHOTON-ATOM COLLISIONS
RESONANCE