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2008•Physics of Atomic NucleiRequires access

Prompt-fission-neutrons spectra of 238U

V. M. Maslov

Open publisher page 10 citations

Abstract

The spectra of prompt fission neutrons from the reaction 238U(n, F) for neutrons of energy in the range E n ≤ 20 MeV are interpreted within the statistical model. It is shown that exclusive spectra of prefission neutrons emitted in (n, xnf) reactions play a decisive role in describing the observed promptfission-neutron spectra and determine the average energies of prompt-fission neutrons. The dependence of the effect of prefission neutrons on the fissility of a target nucleus is demonstrated for the reactions 232Th(n, F), 235U(n, F), and 239Pu(n, F).

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What this paper is about

The spectra of prompt fission neutrons from the reaction 238U(n, F) for neutrons of energy in the range E n ≤ 20 MeV are interpreted within the statistical model. It is shown that exclusive spectra of prefission neutrons emitted in (n, xnf) reactions play a decisive role in describing the observed promptfission-neutron spectra and determine the average energies of prompt-fission neutrons. The dependence of the effect of prefission neutrons on the fissility of a target nucleus is demonstrated for the reactions 232Th(n, F), 235U(n, F), and 239Pu(n, F).

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Available abstract

The spectra of prompt fission neutrons from the reaction 238U(n, F) for neutrons of energy in the range E n ≤ 20 MeV are interpreted within the statistical model. It is shown that exclusive spectra of prefission neutrons emitted in (n, xnf) reactions play a decisive role in describing the observed promptfission-neutron spectra and determine the average energies of prompt-fission neutrons. The dependence of the effect of prefission neutrons on the fissility of a target nucleus is demonstrated for the reactions 232Th(n, F), 235U(n, F), and 239Pu(n, F).

Key concepts: Physics, Neutron, Fission, Nuclear physics, Spectral line, Neutron emission, Neutron temperature, Fast fission

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