T. C. Awes

Trends of light particle spectra observed in nucleus-nucleus collisions

Abstract The emission of energetic light particles (p,d,t) has been studied for 16 O induced reactions on Al, Zr and Au targets at the incident energies of 140, 215 and 310 MeV. The light-particle energy spectra have been analyzed in terms of a moving thermal source. The apparent temperatures exhibit a systematic variation as a function of the incident energy per nucleon above the Coulomb barrier. The observed trend can be extrapolated in a smooth fashion to temperatures obtained in relativistic heavy-ion collisions.

Light-particle spectra observed in central and peripheral collisions of 16O + 238U at 20 MeV/nucleon

Abstract Energetic light particles have been measured in coincidence with two outgoing fission fragments which results from the reaction 16 O + 238 U at 315 MeV. Central and peripheral collisions can be distinguished by the momentum transferred to the target residue as deduced from the angle between coincident fission fragments. A remarkable similarity is observed in the forward angle light particle spectra observed in peripheral and central collisions.

Comparison of non-compound neutron and proton emission in 16O induced reactions on 238U at 310 MeV

Abstract The emission of energetic neutrons and protons in coincidence with fission fragments was measured for the reactions 238U(16O, nf) and 238U(16O, pf). Larger cross sections were observed for the emission of high-energy protons than for the emission of high-energy neutrons. The differences in spectral shapes and the implications for the coalescence model are discussed.