Vector parametrization of the N-atom problem in quantum mechanics.: II.: Coupled-angular-momentum spectral representations for four-atom systems

Within the framework of adapted coupled-angular-momentum spectral representations, the geometrical description of a four-atom molecular system by three Jacobi relative position vectors is shown to result in matrices representing the kinetic energy operator, prediagonalized to a very large extent. A fully diagonal representation is built for the angular (internal and rotational) part of the problem. (C) 1998 American Institute of Physics. [S0021-9606(98)02221-1]