Orateur
Description
Projectile fragmentation at several hundred MeV/nucleon has been crucial to exploring the world of nuclear physics.
One of the reactions in the projectile fragmentation is the charge-changing reaction cross sections (CCCS), which are the total removal probabilities
of one or more protons during the collisions with target nuclei. The reactions have been used to determine the 𝑟𝑚𝑠 proton radii for the most exotic nuclei.
Along with reaction cross sections, it can provide the first hint of exotic structures and phenomena of unstable nuclei and can be used to constrain the nuclear symmetry energies.
I will present our recent CCCS measurements of p-sd shell nuclei on carbon, hydrogen, silver, and lead targets at about 900 and 300 MeV/nucleon at GSI/Germany and HIRFL/China. Benefiting from the large data set, we show the deficiency in the current understanding of the charge-changing reaction mechanism and demonstrate a robust and novel correlation of CCCS with the separation energy of the projectile nuclei. This robust correlation, independent of the reaction energy, helps derive reliable 𝑟𝑚𝑠 proton radii when addressing the exotic nuclei. I will further show that the IQMD+GEMINI works well to predict such reactions and can help reveal the underlying reaction mechanisms.
This, in turn, may open a new way to examine various transportation models in the market.
