2022/03/22 by A. V. Isaev, Isaev, A. V., R. S. Mukhin +57
Engineering · Physics and Astronomy · #Magnetic confinement fusion research #Nuclear physics research studies #Nuclear reactor physics and engineering #nucl-ex
paper · pdf · doi:10.48550/arxiv.2203.11802
arxiv created 2022/03/22 · arxiv updated 2022/03/23
An experiment on the study of the 246Fm spontaneous fission was conducted using the SHELS separator. The isotope was synthesized in the complete fusion reaction of 40Ar beam ions and 208Pb target nuclei. The neutron yields of 246Fm spontaneous fission (ν = 3.79±0.30, σ2ν = 2.1) were obtained using the SFiNx detector system. The multiplicity distribution of emitted prompt neutrons was restored using the Tikhonov method of statistical regularisation (νr = 3.79±0.20, σ2νr = 2.8). The spontaneous fission branching ratio (bSF = 0.061±0.005) and the half-life (T1/2 = 1.50+0.08-0.07 s) of the isotope were determined. The experimental data were compared with scission point model predictions. Excellent convergence was observed in the average number of neutrons per spontaneous fission process. However, the forms of the experimental and model prompt neutron multiplicity distributions differ significantly.