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.