This paper describes a neutron monitor which consists of a spherical neutron moderator, 12′′ in diameter, with a thermal neutron detector which detects delayed β-radiation from silver activation. The thermal neutron detector is based on four silicon diodes at the centre of the moderator, two of which are covered by silver foils, 250 μm thick, and two by tin foils, 360 μm thick. The latter two d...

Prompt and $\beta$-delayed fission observables, such as the average number of prompt delayed neutrons, independent cumulative product yields, $\gamma$-ray energy spectra for photonuclear reactions on $^{235,238}$U $^{239}$Pu are calculated with Hauser-Feshbach Fission Fragment Decay (HF$^3$D) model compared available experimental data. In analysis neutron-induced to case photo-induced fission, ...

The neutron population in a nuclear reactor is subject to fluctuations in time and in space due to the competition of diffusion by scattering, births by fission events, and deaths by absorptions. As such, fission chains provide a prototype model for the study of spatial clustering phenomena. In order for the reactor to be operated in stationary conditions at the critical point, the population o...

This review deals with applications of activation analysis to geological samples : , minerals and rocks . The various activation sources suitable for tb.is purpose are discussed. Applications using isotopic neutron sources are reviewed in some detail , those using neutron generators are discussed on a rrore general basis . Present trends in instrumental neutron-activation techniques are briefly...

A systematic study of the total β-decay half-lives and β-delayed neutron emission probabilities is performed. The β-strength function is treated within the self-consistent density-functional + continuum-QRPA framework including the Gamow-Teller and first-forbidden transitions. The experimental total β-decay half-lives for the Ni isotopes with A ≤76 are described satisfactorily. The half-lives p...