Multiphoton Ionization Of Atoms Research Articles

Effect of Light Polarization on Multiphoton Ionization of Atoms

We present a theoretical interpretation of an effect recently observed in two- and three-photon ionization of Cs. We show that the total cross sections for two- and three-photon ionization of a one-electron atom depend on the polarization of the incident light. Expressions are derived for the ratio of the cross section for circularly polarized light to that for linearly polarized, and their maximum values are obtained.

Multiphoton Ionization of Molecules

This work reports the first attempt at multiphoton ionization of molecules of iodine, heavy water, and carbon tetrachloride. Despite the occurrence of many different ions, only ${\mathrm{I}}^{+}$, ${\mathrm{D}}^{+}$, and C$\mathrm{Cl}_{3}^{}{}_{}{}^{+}$, respectively, were observed quantitatively using the technique of multiphoton ionization of atoms. "Saturation" was observed.

Multiphoton ionization in atomic gases with depletion of neutral atoms

An expression for the number of ions formed by multiphoton ionization of atoms at the focus of a Q-switched laser beam is derived assuming a rate given by existing perturbation treatments. Depletion of neutral atoms has the effect of indicating a lower than expected value for the number of photons absorbed. It is concluded that discrepancies between existing experimental data and perturbation results could be accounted for by such depletion.

1198. Role of bound states in multi-photon ionization of atoms: G A Delone and N B Delone, Zh Eksper Teor Fiz, 54 (4), April 1968, 1067–1068 ( in Russian)

1198. Role of bound states in multi-photon ionization of atoms: G A Delone and N B Delone, Zh Eksper Teor Fiz, 54 (4), April 1968, 1067–1068 ( in Russian)

Multiphoton Ionization of Atomic Hydrogen in the Ground State

The general theory of multiphoton ionization of hydrogen atoms by simultaneous absorption of several photons is discussed. In the nonrelativistic dipole approximation, the calculations lead to a recursion relationship concerning angular functions and involve radial matrix elements containing many summations over intermediate states. A general method for exactly evaluating several sums is described in detail and applied to the photo-ionization of atomic hydrogen in the ground state. Numerical results are presented as dispersion curves of the transition rate $\frac{{\ensuremath{\sigma}}_{n}}{{I}^{N\ensuremath{-}1}}$ for a range of wavelengths from 1000 up to 7200 \AA{}.