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Full-Text Articles in Physics
Strong Field Detachment Of A Negative Ion With Non-Zero Angular Momentum: Application To F-, M. V. Frolov, N. L. Manakov, E. A. Pronin, Anthony F. Starace
Strong Field Detachment Of A Negative Ion With Non-Zero Angular Momentum: Application To F-, M. V. Frolov, N. L. Manakov, E. A. Pronin, Anthony F. Starace
Anthony F. Starace Publications
We apply our recently developed, model-independent quantum approach for intense laser detachment of a weakly bound electron to interpret a recent experiment on above-threshold detachment (ATD) of the F- ion. We find that the measured electron energies correspond to the “Keldysh part” of the ATD spectrum, just below the onset of our predicted rescattering plateau. Overall, our predicted ATD spectrum (using a scaled peak intensity and focal averaging) is in excellent agreement with the experimental data, except for certain structures observed for electron energies above 12.6 eV that we attribute to known two-electron resonances of F-. A …
Model-Independent Quantum Approach For Intense Laser Detachment Of A Weakly Bound Electron, M.V. Frolov, N. L. Manakov, E.A. Pronin, Anthony F. Starace
Model-Independent Quantum Approach For Intense Laser Detachment Of A Weakly Bound Electron, M.V. Frolov, N. L. Manakov, E.A. Pronin, Anthony F. Starace
Anthony F. Starace Publications
We present a model-independent theory for laser detachment of a weakly bound electron having a nonzero angular momentum. Our treatment reduces to the well-known Keldysh result for tunnel ionization upon neglecting rescattering effects. Numerical results for the above-threshold detachment spectrum of a negative ion having an outer p electron show significant modification of the rescattering plateau as compared to that for an ion having an outer s electron.
Two-Active Electron Approach To Multi-Electron Systems In Intense Ultrashort Laser Pulses: Application To Li–, G. Lagmago Kamta, Anthony F. Starace
Two-Active Electron Approach To Multi-Electron Systems In Intense Ultrashort Laser Pulses: Application To Li–, G. Lagmago Kamta, Anthony F. Starace
Anthony F. Starace Publications
The interaction of Li– with an ultrashort intense laser pulse is investigated by solving the time-dependent Schrödinger equation (TDSE) in the dipole approximation using a two-active electron approach. We describe the numerical solution of the TDSE and give a more detailed presentation of a technique for obtaining angular distributions for double ionization by intense ultrashort laser pulses. We show how selection rules observed in the angular distributions for double ionization by an intense laser field can be derived from the symmetry properties of the wave function. In an attempt to elucidate the mechanisms for double ionization in the multiphoton …
Multiphoton Detachment Of A Negative Ion By An Elliptically Polarized, Monochromatic Laser Field, N. L. Manakov, M. V. Frolov, Bogdan Borca, Anthony F. Starace
Multiphoton Detachment Of A Negative Ion By An Elliptically Polarized, Monochromatic Laser Field, N. L. Manakov, M. V. Frolov, Bogdan Borca, Anthony F. Starace
Anthony F. Starace Publications
The quasistationary quasienergy state approach (QQES) is applied to the analysis of partial (n-photon) decay rates and angular distributions (ADs) of photoelectrons produced by an elliptically polarized laser field. The problem is formulated for a weakly bound electron with an energy E0 in the three-dimensional δ-model potential (which approximates the short-range potential of a negative ion) interacting with a strong monochromatic laser field having an electric vector F(ωt).The results presented cover weak (perturbative), strong (nonperturbative), and superstrong field regimes as well as a wide interval of frequencies ω extending from the tunnelling (ħω << |E0 …