Reduction of the Fourth-Order Asymmetric-Rotor Hamiltonian

Abstract

By use of the angular-momentum commutation relations, the fourth-order asymmetric-rotor Hamiltonian for molecules of orthorhombic symmetry has been considerably simplified. The number of rotational coefficients has been reduced to 19: three coefficients of second power, six coefficients of the fourth power, and 10 coefficients of sixth power in the angular momentum.