FOCK SPACE MULTIREFERENCE COUPLED-CLUSTER STUDY OF TRANSITION-MOMENT AND OSCILLATOR STRENGTH

A method of calculating transition moment and oscillator strength with in the framework of the Fock space multi-reference coupled cluster met hod is described. Diagrammatic technique is used to obtain coupled clu ster equations. The general form of equations for the transition momen t between N-electron ground and excited states is obtained. MBPT analy sis of the final equations is done. The excitation energies, dipole tr ansition moments and oscillator strengths for the CH+ molecule are cal culated.