Ionization of the hydrogen atom by short half-cycle pulses: Dependence on the pulse duration

D. G. Arbó, M. S. Gravielle, K. I. Dimitriou, K. Tőkési, S. Borbély, J. E. Miraglia

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A theoretical study of the ionization of hydrogen atoms by short external half-cycle pulses (HCPs) as a function of the pulse duration, using different quantum and classical approaches, is presented. Total ionization probability and energy distributions of ejected electrons are calculated in the framework of the singly-distorted Coulomb-Volkov (SDCV) and the doubly-distorted Coulomb-Volkov (DDCV) approximations. We also performed quasiclassical calculations based on a classical trajectory Monte Carlo method which includes the possibility of tunneling (CTMC-T). Quantum and classical results are compared to the numerical solution of the time-dependent Schrödinger equation (TDSE). We find that for high momentum transfers the DDCV shows an improvement compared to the SDCV, especially in the low-energy region of the electron emission spectra, where SDCV fails. In addition, DDCV reproduces successfully the TDSE electron energy distributions at weak momentum transfers. CTMC-T results reveal the importance of tunneling in the ionization process for relative long pulses and strong momentum transfers but fails to overcome the well-known classical suppression observed for weak electric fields.

Original languageEnglish
Pages (from-to)193-200
Number of pages8
JournalEuropean Physical Journal D
Volume59
Issue number2
DOIs
Publication statusPublished - Aug 2010

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momentum transfer
hydrogen atoms
pulse duration
ionization
cycles
energy distribution
pulses
electron emission
Monte Carlo method
emission spectra
retarding
trajectories
electron energy
electric fields
approximation
electrons
energy

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Ionization of the hydrogen atom by short half-cycle pulses : Dependence on the pulse duration. / Arbó, D. G.; Gravielle, M. S.; Dimitriou, K. I.; Tőkési, K.; Borbély, S.; Miraglia, J. E.

In: European Physical Journal D, Vol. 59, No. 2, 08.2010, p. 193-200.

Research output: Contribution to journalArticle

Arbó, D. G. ; Gravielle, M. S. ; Dimitriou, K. I. ; Tőkési, K. ; Borbély, S. ; Miraglia, J. E. / Ionization of the hydrogen atom by short half-cycle pulses : Dependence on the pulse duration. In: European Physical Journal D. 2010 ; Vol. 59, No. 2. pp. 193-200.
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