Two-photon detachment cross sections and dynamic polarizability of H- using a variationally stable, coupled-channel hyperspherical approach

Variational methods for high-order multiphoton processes

Methods for applying the variationally stable procedure for Nth-order perturbative transition matrix elements of Gao and Starace [Phys. Rev. Lett. 61, 404 (1988); Phys. Rev. A 39, 4550 (1989)] to multiphoton processes involving systems other than atomic H are presented. Three specific cases are discussed: one-electron ions or atoms in which the electron-ion interaction is described by a central...

Variationally stable treatment of two- and three-photon detachment of H- including electron-correlation effects.

Long-Range Dipole Field Effects on H– Detachment Processes above the H(n=2) Threshold

The long-range dipole field interaction between a low energy electron and the hydrogen atom in the n = 2 state is shown to be the key for understanding significant features of a number of Hdetachment processes. Collisional, single photon, and two-photon detachment processes are examined, each of which is shown to be sensitive to different aspects of low-energy H(n=2&einteractions. Specifically,...

The photon scattering cross - sections of atomic hydrogen

We present a unified view of the frequency dependence of the various scattering processes involved when a neutral hydrogen atom interacts with a monochromatic, linearly-polarized photon. A computational approach is employed of the atom trapped by a finite-sized-box due to a finite basis-set expansion, which generates a set of transition matrix elements between E < 0 eigenstates and E > 0 pseudo...

Ejected-energy differential cross sections for the electron-impact detachment of H-

Electron-impact detachment cross sections for H− are calculated using time-dependent close-coupling theory. The three-electron wavefunction is expanded in terms of a product of a frozen core 1s hydrogenic wavefunction and a correlated two-electron wavefunction which fully describes the ejected and scattered electrons at all times following the collision. Ejected-energy differential and total in...