Multiplicity of fast neutrons in the spontaneous fission of256Fm

Sokol, E. A.; Zeinalov, Sh.S.; Ter‐Akopian, G. M.

doi:10.1007/bf01126141

Cited by 7 publications

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“…Data on prompt neutron yields from spontaneous fission were accumulated earlier for many isotopes with Z < 100, mainly in offline experiments. For fermium (Z = 100), such data were obtained both for neutron-rich isotopes 254,256,257 Fm [1,2,3] and neutron-deficient ones (online experiments) 244,246 Fm [4,5]. The 246 Fm prompt γ-ray spectroscopy was performed at the University of Jyväsjylä [6] and is the lowest cross-section reaction where this was possible for such heavy nuclei.…”

Section: Introductionmentioning

confidence: 99%

Spontaneous fission of 246Fm

Isaev¹,

Mukhin²,

Andreev³

et al. 2022

Preprint

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An experiment on the study of the 246 Fm spontaneous fission was conducted using the SHELS separator. The isotope was synthesized in the complete fusion reaction of 40 Ar beam ions and 208 Pb target nuclei. The neutron yields of 246 Fm spontaneous fission (ν = 3.79 ± 0.30, σ 2 ν = 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, σ 2 νr = 2.8). The spontaneous fission branching ratio (bSF = 0.061 ± 0.005) and the half-life (T 1/2 = 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.

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