Correlation structure in nondipole photoionization

Dipole and nondipole photoionization of molecular hydrogen

We describe a theoretical approach to molecular photoionization that includes first-order corrections to the dipole approximation. The theoretical formalism is presented and applied to photoionization of H2 over the 20to 180-eV photon energy range. The angle-integrated cross section σ , the electric dipole anisotropy parameter βe, the molecular alignment anisotropy parameter βm, and the first-o...

Nondipole Effects in Photoionization of Rare Gas Atoms

We present a discussion of octupole and other O(k2) (k = 2π/λ, where λ is the photon wavelength) corrections to to the angular distribution of photoelectrons from noble-gas atoms. These corrections are characterized by four parameters ∆β, λ, μ, and ν constrained by λ+μ+ν = 0. As an example, we consider photoionization of n = 2 shell of neon for photon energies below 2 keV. The resulting angular...

Low-energy nondipole effects in molecular nitrogen valence-shell photoionization.

Observations are reported for the first time of significant nondipole effects in the photoionization of the outer-valence orbitals of diatomic molecules. Measured nondipole angular-distribution parameters for the 3sigma(g), 1pi(u), and 2sigma(u) shells of N2 exhibit spectral variations with incident photon energies from thresholds to approximately 200 eV which are attributed via concomitant cal...

A Case for Chiral Contributions to Nondipole Effects in Photoionization Using Linearly Polarized Soft X-rays

...................................................................................................................................................... iii Acknowledgements ..................................................................................................................................... iv Dedication.................................................................................

Nondipole effects in the triply differential cross section for double photoionization of He