Study of the low-lying collective states in 94–100Mo isotopes using the MAVA

A systematic investigation of reduced electric quadrupole decay strengths, B(E2) and level energies of even 94–100Mo isotopes is performed using the microscopic anharmonic vibrator approach (MAVA). The MAVA is suited for dynamical microscopic description of two-phonon-like states and their energy splitting due to interaction with low-lying one-phonon states. The starting point for the model is a realistic single-particle valence space and a microscopic many-body Hamiltonian which is used to generate the one-phonon states by the use of the quasiparticle random-phase approximation (QRPA). The same Hamiltonian generates also the interaction between the one- and two-phonon states. Comparison of the calculated energies and B(E2) values with the available data suggests that 94–100Mo are closer to anharmonic vibrators than deformed rotors.