Microwave Spectra of CsF, CsCl, and CsBr

Abstract
Molecular constants for CsF, CsCl, and CsBr have been determined from measurements of their pure rotational spectra in the microwave region. These and other data allow a test of the constancy of ionic bonding radii. Measurements of isotopic species of these molecules give the mass ratios of the stable Cl and Br isotopes.