The SFiNx Detector System
Résumé
A new detector system for investigating the properties of spontaneous fission of short-lived transuranium nuclei has been created. This system consists of an assembly of double-sided silicon strip detectors surrounded by 116 proportional neutrons counters filled with $^{3}$He. The neutron registration efficiency is 54.7 ± 0.1%. The detector system is tested in an experiment investigating the characteristics of spontaneous fission of the $^{252}$No isotope. The experimental data on neutron yields are compared with previously published results. The average number of neutrons per fission act ($\bar {\nu }$ = 4.25 $ \pm $ 0.09) and the multiplicity distribution of prompt neutrons are obtained. The true form of the neutron distribution is reconstructed via a statistical regularization.
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