Numerical Simulation of the Yield of α Particles and Neutrons from the 11B(p, 3α) and 11B(p, n)11C Nuclear Reactions Induced by Intense Picosecond Laser Radiation

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Abstract The yields of alpha particles and neutrons from the promising 11B(p, 3α) fusion reaction and the reference 11B(p, n)11C nuclear reaction, respectively, which are induced by intense picosecond laser radiation with an intensity of 2 × 1018 W/cm2, have been numerically simulated. The numerical simulation of the interaction of a laser pulse with a primary aluminum target has been carried out in the two-dimensional xz version of the KARAT PIC (particle-in-cell) code in two stages. First, the proton flux from the back side of the Al target on which the laser pulse is incident has been calculated. Second, 11B(p, 3α) and 11B(p, n)11C reactions induced by the proton beam in the boron target have been simulated. The calculations have shown that the total yield of alpha particles is Nα = 7.2 × 108, the number of alpha particles with energies above 0.5 MeV that reach a detector is 2 × 107, which is 2.8% of their total yield, and the total yield of neutrons is Yn = 105. The numerical simulation gives the yields of alpha particles and neutrons from the 11B(p, 3α) and 11B(p, n)11C reactions per pulse that are in sufficiently good agreement with experimental data.

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