Results 21 to 30 of about 82,136 (272)
, 1943 Measurements of the spectrum of the fission neutrons of 25 are described, in which the energy of the neutrons is determined from the ionization produced by individual hydrogen recoils. The slow neutrons producing fission are obtained by slowing down the fast neutrons from the Be-D reaction of the Stanford cyclotron.
Bloch, F., Staub, H.
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STEK: A potential fast spectrum benchmark for fission product cross sections
Frontiers in Energy Research, 2023 The reactivity worth of many fission product samples was measured in fast spectrum conditions in the STEK facility during the early 1970s. These results were then used to improve and validate nuclear data evaluations for fission products, but in the last
Steven van der Marck, Arjan Koning
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Late Prompt Fission Gamma Rays from 235U(n,f) and 252Cf(sf) [PDF]
EPJ Web of Conferences, 2020 Two measurements of fission γ rays were performed with the DANCE and NEUANCE arrays using the reactions 235 U(n, f) and 252 Cf(sf). Utilizing the fast time response of the detectors and a method for estimating the accidental background, we obtained the ...
Rusev G. +11 more
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Energies, 2020 This work applies the Second-Order Adjoint Sensitivity Analysis Methodology (2nd-ASAM) to compute the 1st-order and unmixed 2nd-order sensitivities of a polyethylene-reflected plutonium (PERP) benchmark’s leakage response with respect to the benchmark’s ...
Dan G. Cacuci +2 more
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Development of parallel plate avalanche counters for prompt fission neutron spectrum measurement
He jishu, 2021 BackgroundThe prompt fission neutron spectrum (PFNS) is an important nuclear reaction data. Coincident measurement between neutron detectors and parallel plate avalanche counters (PPAC) is widely used to measure the PFNS below the energy of the neutron ...
ZHU Yiwei +8 more
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Method for calculating delayed gamma-ray response in the ACRR Central Cavity using MCNP [PDF]
EPJ Web of Conferences, 2023 This document presents the process for a new method developed for the characterization of the delayed gamma-ray radiation fields in pulse reactors like the Annular Core Research Reactor (ACRR).
Moreno Melissa, Parma Edward
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Energies, 2020 By applying the Second-Order Adjoint Sensitivity Analysis Methodology (2nd-ASAM) to the polyethylene-reflected plutonium (PERP) benchmark, this work presents results for the first- and second-order sensitivities of this benchmark’s leakage response
Ruixian Fang, Dan Gabriel Cacuci
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Directional detection of fission-spectrum neutrons [PDF]
2007 IEEE Long Island Systems, Applications and Technology Conference, 2007 Conventional neutron detectors consisting of 3 He tubes surrounded by a plastic moderator can be quite efficient in detecting fission spectrum neutrons, but do not indicate the direction of the incident radiation. We have developed a new directional detector based on double proton recoil in two separated planes of plastic scintillators.
Peter E. Vanier +4 more
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Low-mass fission detector for the fission neutron spectrum measurement [PDF]
, 2010 For the fission neutron spectrum measurement, the neutron energy is determined in a time-of-flight experiment by the time difference between the fission event and detection of the neutron. Therefore, the neutron energy resolution is directly determined by the time resolution of both neutron and fission detectors. For the fission detection, the detector
Wu, C Y +4 more
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IMPACT OF VARIOUS SOURCE OF COVARIANCE INFORMATION ON INTEGRAL PARAMETERS UNCERTAINTY DURING DEPLETION CALCULATIONS WITH CASMO-5 [PDF]
EPJ Web of Conferences, 2021 This paper describes the effect of input uncertainties on a set of integral parameters (kinf, nuclide compositions) associated with the validation of CASMO-5 against PIE data.
Hursin Mathieu +4 more
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