Angular momentum projection in the two-center model by projection of Hilbert spaces

The theory of radial canonical transformations is used as a tool for angular momentum projection in quantum-mechanical problems with central interactions. The method is developed for the case where an n-body system is described by two fragments of internal angular momentum zero with oscillator wave functions of arbitrary width, with particular attention to the two-center model. By way of example the applicability of the effective Brink-Boeker nucleon-nucleon interaction for functions with independently varied width parameters is tested. A negative answer results. (Auth.)