B. Jaduszliwer

Measurements of the electric dipole polarizabilities of the alkali halide dimers

We report the first measurements of the average electric dipole polarizabilities of five alkali halide dimers. A combined monomer‐dimer molecular beam deflection pattern in an inhomogeneous electric field is subject to an appropriate computational analysis to extract the polarizabilities. A simple combination of bond and effective ionic models to estimate the polarizabilities gives reasonably good agreement with the measured values. The values are, in units of 10−24 cm2, (KF)2:25.3±3.2; (KCl)2:28.6±3.0; (RbCl)2:43.4±4.2; (CsCl)2:36.6±5.0; (CsF)2:21.2±2.6.

Total Cross Sections for the Scattering of Low-Energy Electrons by Excited Sodium Atoms

Preliminary values of the total scattering cross section of electrons on 3P3/2 sodium atoms have been measured at 1.0, 2.0, and 3.0 eV by an atomic double-recoil method. The atoms are excited by a single-mode tunable dye laser. The atomic recoil due to resonant photon interactions is used to spatially separate the excited atoms and to determine the fraction of excited atoms. Standard recoil techniques are used to determine the total cross sections. The results are compared with close-coupling calculations.