Study of fusion-fission in inverse kinematics with a fragment separator

TL;DR

This study uses inverse kinematics and a high-resolution spectrometer to systematically measure fission fragment yields, providing valuable data to improve fission models and understand decay mechanisms.

Contribution

It demonstrates the effectiveness of inverse kinematics combined with a spectrometer for identifying and measuring fission fragments in different reaction conditions.

Findings

Mass and atomic number distributions vary with target material.

Unique isotope identification was achieved using advanced measurement techniques.

Revealed different reaction mechanisms for 9Be and 12C targets.

Abstract

The systematic study of fission fragment yields under different initial conditions provides a valuable experimental benchmark for fission models that aim to understand this complex decay channel and to predict reaction product yields. Inverse kinematics coupled to the use of a high-resolution spectrometer is shown to be a powerful tool to identify and measure the inclusive isotopic yields of fission fragments. In-flight fusion fission was used to produce secondary beams of neutron-rich isotopes in the collision of a 238U beam at 24 MeV/u with 9Be and 12C targets at GANIL using the LISE3 fragment-separator. Unique A,Z,q identification of fission products was attained with the dE-TKE-Brho-ToF measurement technique. Mass, and atomic number distributions are reported for the two reactions that show the importance of different reaction mechanisms for these two targets.