Positron Scattering from Atoms and Molecules

Low-energy positron scattering from atoms and molecules using positron accumulation techniques

Positron scattering from atoms and molecules is studied at low values of incident positron energy. The experiments use a cold magnetized positron beam formed in a positron accumulator. A discussion of positron scattering in a magnetic ®eld is presented along with di€erential cross-sections (DCS) for positron±atom collisions and positron± molecule total vibrational excitation cross-sections. Abs...

New Results for Positron Scattering from Noble Gas Atoms and Diatomic Molecules

OF THE DISSERTATION New Results for Positron Scattering from Noble Gas Atoms and Diatomic Molecules

g-ray spectra from positron annihilation on atoms and molecules

Positron annihilation on a wide variety of atoms and molecules is studied. Room-temperature positrons confined in a Penning trap are allowed to interact with molecules in the form of low-pressure gases so that the interaction is restricted to binary encounters between a positron and a molecule. Data are presented for the g-ray spectra resulting from positrons annihilating in such interactions. ...

Positron Annihilation on Atoms and Molecules

OF THE DISSERTATION Positron Annihilation on Atoms and Molecules

X-Ray Scattering and Fluorescence from Atoms and Molecules