New Measurements of the Transverse Beam Asymmetry for Elastic Electron Scattering from Selected Nuclei
Not Available
Abrahamyan, S.↗
Engineering topics
Horowitz, C J
Publications and source records attributed to Horowitz, C J.
Radiative Corrections to the PREX and QWEAK Experiments
The high precision parity violating electron scattering experiments PREX and QWEAK are sensitive to radiative corrections. In this paper we introduce the PREX experiment that measures the neutron radius of {sup 208}Pb and discuss coulomb distortion corrections. We then discuss dispersion corrections for QWEAK that aims to measure the weak charge of the proton.
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
Model dependence of the γZ dispersion correction to the parity-violating asymmetry in elastic ep scattering
Not Available
Gorchtein, Mikhail↗
Diffusion in Coulomb crystals
Diffusion in Coulomb crystals can be important for the structure of neutron star crusts. We determine diffusion constants D from molecular dynamics simulations. We find that D for Coulomb crystals with relatively soft-core 1/r interactions may be larger than D for Lennard-Jones or other solids with harder-core interactions. Diffusion, for simulations of nearly perfect body-centered-cubic lattices, involves the exchange of ions in ringlike configurations. Here ions ''hop'' in unison without the formation of long lived vacancies. Diffusion, for imperfect crystals, involves the motion of defects. Finally, we find that diffusion, for an amorphous system rapidly quenched from Coulomb parameter {Gamma}=175 to Coulomb parameters up to {Gamma}=1750, is fast enough that the system starts to crystalize during long simulation runs. These results strongly suggest that Coulomb solids in cold white dwarf stars, and the crust of neutron stars, will be crystalline and not amorphous.
36 MATERIALS SCIENCE↗