Abstract
The electric and magnetic interactions which determine the hfs of the v=0, state in F, F, F, and F have been obtained from spectra measured in zero magnetic field and near zero electric field. A molecular-beam electric-resonance apparatus with two-wire-type focusing fields and a single 30-cm transition field was used. For F and F the electric quadrupole interaction constants are Mc/sec and Mc/sec, respectively. Hence the ratio of the Rb nuclear quadrupole moments is . Comparison with data on the electric quadrupole interaction constants for Cl and Cl gives no evidence of a contribution from nuclear electric polarization. In F, the constant of the spin-rotation interaction involving the Rb nucleus is kc/sec, the constant of the spin-rotation interaction involving the F nucleus is kc/sec, and the constant of the electron-coupled nuclear dipole-dipole scalar interaction is kc/sec. In F, these interaction constants are kc/sec, kc/sec, and kc/sec. The Hamiltonian also includes a nuclear dipole-dipole tensor term, and the interaction constants are kc/sec and kc/sec in F and F, respectively. These agree very well with values calculated from (), so that there is no evidence for a tensor part of the electron-coupled nuclear dipole-dipole interaction in RbF. The electric quadrupole interaction constants are kc/sec and kc/sec for F and F, respectively. The ratio of the nuclear quadrupole moments is . The observed F spectrum also allowed the determination of the interaction constants: cps; kc/sec; cps; cps. We point out that experimental evidence for nuclear polarizability of Br nuclei is provided by data of others on the electric quadrupole interaction constants of and in the Br atom and in LiBr.
- Received 31 October 1966
DOI:https://doi.org/10.1103/PhysRev.161.15
©1967 American Physical Society