Transfer-induced fission in inverse kinematics: Impact on experimental and evaluated nuclear data bases
Résumé
Inverse kinematics is a new tool to study nuclear fission. Its main advantage is the possibility to
measure with an unmatched resolution the atomic number of fission fragments, leading to new observables
in the properties of fission-fragment distributions. In addition to the resolution improvement, the study
of fission based on nuclear collisions in inverse kinematics beneficiates from a larger view with respect to
the neutron-induced fission, as in a single experiment the number of fissioning systems and the excitation
energy range are widden. With the use of spectrometers, mass and kinetic-energy distributions may now be
investigated as a function of the proton and neutron number sharing. The production of fissioning nuclei
in transfer reactions allows studying the isotopic yields of fission fragments as a function of the excitation
energy. The higher excitation energy resulting in the fusion reaction leading to the compound nucleus
250Cf at an excitation energy of 45MeV is also presented. With the use of inverse kinematics, the charge
polarisation of fragments at scission is now revealed with high precision, and it is shown that it cannot
be neglected, even at higher excitation energies. In addition, the kinematical properties of the fragments
inform on the deformation configuration at scission