Low-energy structure of above-threshold-ionization electron spectra: Role of the Coulomb threshold effect

Journal Article · Wed Jun 15 04:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.063406· OSTI ID:21550129

Telnov, Dmitry A ^[1]; Chu, Shih-I ^[2]

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1. Department of Physics, St. Petersburg State University, St. Petersburg 198504 (Russian Federation)
2. Department of Chemistry, University of Kansas, Lawrence, Kansas 66045 (United States)

Recent experimental observations of above-threshold ionization of rare gas atoms and diatomic molecules by midinfrared laser fields [C. I. Blaga et al., Nat. Phys. 5, 335 (2009); W. Quan et al., Phys. Rev. Lett. 103, 093001 (2009)] revealed a prominent maximum in the electron energy spectrum very close to the ionization threshold which is not reproduced by widely used Keldysh-Faisal-Reiss theories. We have performed fully ab initio theoretical analysis and precision calculations to explore the quantum origin of the low-energy structure (LES) observed in the experiments. Our study shows that an important role in shaping of LES is played by the effect of Coulomb attraction in the final electron state and the Coulomb threshold effect.

• OSTI ID: 21550129
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ACCURACY
ATOMS
COULOMB FIELD
ELECTRIC FIELDS
ELECTROMAGNETIC RADIATION
ELECTRON SPECTRA
ELECTRONS
ELEMENTARY PARTICLES
ENERGY SPECTRA
FERMIONS
IONIZATION
LASER RADIATION
LEPTONS
MOLECULES
RADIATIONS
SPECTRA