Preequilibrium neutron emission from O + Al at 7.5 MeV/nucleon and 8.8 MeV/nucleon
Abstract
The thick target neutron yield from a 16O6 + beam on a thick 27Al target at 120- and 142-MeV (7.5- and 8.8-MeV/nucleon, respectively) incident energies is presented and compared with theoretical calculations. The theoretical estimates for the yield of a high-energy neutron was obtained using a preequilibrium (PEQ) heavy-ion reaction model (hion), whereas that for the low-energy part was obtained using the standard evaporation models pace4 and empire 3.2. In the present data a significant PEQ contribution, ∼2 % to 3% of the evaporation contribution, is observed even at projectile energies below 10 MeV/nucleon. The measured energy spectrum of neutrons for E >20 MeV (the predominant PEQ region) is in good agreement with the PEQ model code hion.
- Publication:
-
Physical Review C
- Pub Date:
- October 2017
- DOI:
- 10.1103/PhysRevC.96.044607
- Bibcode:
- 2017PhRvC..96d4607P