Energy Deposition in Intermediate-Energy Nucleon-Nucleus Collisions

Isotopic production cross sections in proton-nucleus collisions at 200 MeV

“…We have measured IMF (He-C) emission for 27 Al, the thickness of the first ∆E counter. Emission of fragments with a significantly smaller…”

“…However, the energy of the maximum abundance of protons in cosmic rays is around 200 MeV [12,13]. We measured intermediate mass fragments at a proton beam energy of 200 MeV incident on three targets spanning the periodic table, namely, 27 Al, 59 Co and 197 Au. These data complement previous cross sections for proton, deuteron and tritium emission on 27 Al and 197 Au [14,15].…”

“…We measured intermediate mass fragments at a proton beam energy of 200 MeV incident on three targets spanning the periodic table, namely, 27 Al, 59 Co and 197 Au. These data complement previous cross sections for proton, deuteron and tritium emission on 27 Al and 197 Au [14,15]. The cross sections given there for 3 He and α-particles are too small when compared to systematics [16,17].…”

Cluster production within antisymmetrized molecular dynamics

“…The formation of fragments and light clusters should be closely related to the property of such expanding nuclear matter. On the other hand, the target nucleus can also break up into fragments in light-ion induced reactions, as in the experiments [3], even though the excitation of the nucleus does not primarily induce strong collective expansion. Formation of fragments and clusters is one of the essential features of these reactions, since they are produced in most of the events in these reactions with the participation of most of the nucleons in the system.…”

“…However, transport models have been developed based on the single-nucleon motions, and only few models treat cluster correlations explicitly. In a version of BUU by Danielewicz et al [14], clusters up to 3 H and 3 He have been introduced as new particle species and the equations for the distribution functions are coupled by the collision terms representing various reactions of clusters and nucleons. A recent calculation by this model demonstrates that collision dynamics is influenced by the clusters [15].…”