NEW DEVELOPMENTS IN THE MICROSCOPIC DESCRIPTION OF THE FISSION PROCESS

Fission is a complex process which highlights many nuclear properties. Among the different theoretical approaches able to describe fission, microscopic ones have the advantage of describing the nuclear structure and the dynamics in a consistent manner. Along this line, we are now developing a formalism able to treat on the same footing the collective dynamics and the intrinsic excitations. This approach is based on the non adiabatic time-dependent Generator Coordinate Method, where couplings between HFB states and 2 quasi-particle states are explicitly taken into account. Guidelines of the new formalism under development are presented and some preliminary results on overlaps between non excited and excited states are discussed.