Study of high-energy fission and quasi-fission with inverse kinematics.

Mantovani G., Ramos D., Caamano M., Lemasson A., Rejmund M., Audoin L., Álvarez H. Pol, Frankland J., Fernández-Dominguez B., Galiana-Baldó E., Piot J., Gramegna F., Marchi T., Cicerchia M., Ackermann D., Biswas S., Clement E., Durand D., Farget F., Fregeau M.O., Galaviz D., Heinz A., Henriques A.I., Jacquot B., Jurado B., Kim Y., Morfouace P., Ralet D., Roger T., Schmitt C., Teubig P., Tsekhanovich I.

I - Fisica nucleare e subnucleare
Aula Palazzo dell'Emiciclo - Sala Ipogea - Mercoledì 25 h 10:00 - 13:00
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Since its discovery, fission appeared as a complex process where different nuclear properties interplay and shape the characteristics of the emerging fission fragment distributions. Some features in the total kinetic energy and in the $N/Z$ distributions of the fragments, commonly associated with shell effects, came out in a series of recent experiments with high excitation energy fusion-fission reactions in inverse kinematics. The use of inverse kinematics with the VAMOS magnetic spectrometer at GANIL (France) coupled with SPIDER $\Delta E - E$ telescopes allows the identification of the fissioning system and permits to extract properties such as the mass and atomic number distributions of the emitted fragments, as well as their total kinetic energy. In the latest experiment of this campaign, a study of high-energy fission and quasi-fission between a ${}^{238}U$ beam and a series of light targets was carried out by using the aforementioned technique, in order to probe the role of the shell structure in these processes. This contribution will be focused on the latest results and the ongoing analysis of the yields of the fragment mass and nuclear charge distributions, as well as of the neutron-to-proton ratio, and their link with possible structure effects.

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