Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91103, USA
Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37916, USA
Abstract:
A rigorous calculation of the quantum-mechanical rotational partition function for tetrahedral XY4 molecules yields Qr = (
)(2IY + 1)4π-
exp(/4), where IY is the spin of the Y nucleus, and ≡ Bhc/kT. This result is accurate to 1 per cent or better for all values of B and T such that <
.