The rotational Zeeman effect in ArHBr: An interpretation of the rotational Zeeman parameters in rare gas hydrogen halide complexes

摘要

The rotational Zeeman effect in the ArHBr van der Waals molecule has been studied using the method of pulsed Fourier transform microwave spectroscopy carried out in Fabryndash;Perot cavity located in the bore of a superconducting magnetic solenoid. The rotational magnetic dipole moment, magnetic susceptibility anisotropy, and bromine bulk shielding constant were determined. The values for ArH79thinsp;Br are:gperp;=0.000thinsp;20(5), khgr;par;ndash;khgr;perp;=minus;0.13(9)times;10minus;9MHz/G2, and sgr;Br=4000(2000) ppm. The equations describing these molecular Zeeman parameters in terms of the properties of the constituent subunits of the complex are derived from the full dynamic molecular Hamiltonian. The rotationalgvalue is a sensitive measure of the degree of Coriolis coupling in the complex. The molecular quadrupole moment of ArHBr is calculated.