P. Zugec, N. Colonna, D. Bosnar, E. Griesmayer, E. Jericha, H. Leeb, -. n_TOF Collaboration et al.:
"Integral measurement of the 12C(n, p)12B reaction up to 10 GeV";
European Physical Journal A,
The integral measurement of the 12C(n, p)12B reaction was performed at the neutron time-of-flight facility n_TOF at CERN. The total number of 12B nuclei produced per neutron pulse of the n_TOF beam was determined using the activation technique in combination with a time-of-flight technique. The cross section is integrated over the n_TOF neutron energy spectrum from reaction threshold at 13.6 MeV to 10 GeV. Having been measured up to 1 GeV on basis of the 235U(n,f) reaction, the neutron energy spectrum above 200 MeV has been re-evaluated due to the recent extension of the cross section reference for this particular reaction, which is otherwise considered a standard up to 200 MeV. The results from the dedicated GEANT4 simulations have been used to evaluate the neutron flux from 1 GeV up to 10 GeV. The experimental results related to the 12C(n,p)12B reaction are compared with the evaluated cross sections from major libraries and with the predictions of different GEANT4 models, which mostly underestimate the 12B production. On the contrary, a good reproduction of the integral cross section derived from measurements is obtained with TALYS-1.6 calculations, with optimized parameters.
Neutron Energy Spectrum; Integral Cross Section; GEANT4 Model; Reaction Threshold; Neutron Flux; GEANT4 Simulation; Neutron Pulse; Activation Technique; Experimental Result; Nuclear; Nuclear Fusion; Heavy Ion; Nuclear Physic
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