Neutron spectra

Xem 1-6 trên 6 kết quả Neutron spectra

Correlation n¯¯p − s − x in the fast neutron range via integral information

This paper presents a Bayesian approach based on integral experiments to create correlations which do not appear with differential data. Some quantities such as the ﬁssion cross section (s), neutron multiplicity (n¯p), neutron spectra (x), etc. are usually neither modeled together nor measured in coincidence, thus there is no correlation matrices in evaluated nuclear data libraries.

8p christabelhuynh 30-05-2020 15 0 Download

ARIADNE – a program estimating covariances in detail for neutron experiments

The python program ARIADNE is a tool developed for evaluators to estimate detailed uncertainties and covariances for experimental data in a consistent and efﬁcient manner. Currently, it is designed to aid in the uncertainty quantiﬁcation of prompt ﬁssion neutron spectra, and was employed to estimate experimental covariances for CIELO and ENDF/B-VIII.0 evaluations.

9p christabelhuynh 29-05-2020 12 2 Download

Estimating model bias over the complete nuclide chart with sparse Gaussian processes at the example of INCL/ABLA and double-differential neutron spectra

This paper shows how a sparse approximation to Gaussian processes can be used to estimate the model bias over the complete nuclide chart at the example of inclusive double-differential neutron spectra for incident protons above 100 MeV.

10p christabelhuynh 29-05-2020 5 0 Download
Uncertainties for Swiss LWR spent nuclear fuels due to nuclear data

This paper presents a study of the impact of the nuclear data (cross sections, neutron emission and spectra) on different quantities for spent nuclear fuels (SNF) from Swiss power plants: activities, decay heat, neutron and gamma sources and isotopic vectors.

15p christabelhuynh 29-05-2020 7 1 Download
Application of a dynamic-nanoindentation method to analyze the local structure of an Fe-18 at.% Gd cast alloy

A dynamic nanoindentation method was applied to study an Fe-18 at.% Gd alloy as a neutron-absorbing material prepared by vacuum arc-melting and cast in a mold. The Fe-18 at.% Gd cast alloy had a microstructure with matrix phases and an Fe-rich primary dendrite of Fe9Gd. Rietveld refinement of the X-ray spectra showed that the Fe-18 at.% Gd cast alloy consisted of 35.84 at.% Fe3Gd, 6.58 at.% Fe5Gd, 16.22 at.% Fe9Gd, 1.87 at.% Fe2Gd, and 39.49 at.% b-Fe17Gd2. The average nanohardness of the primary dendrite phase and the matrix phases were 8.7 GPa and 9.3 GPa, respectively.

5p minhxaminhyeu4 26-06-2019 17 1 Download
A study of neutron emission spectra and angular distribution of neutron from (p,n) reaction on some targets of heavy elements

For the design of ADS (Accelerator Driven System), it is important to study neutron spectra and details of nuclear reactions induced by neutrons. Furthermore, neutron energy and angular distribution data are important for a correct simulation of the propagation of particles inside a spallation target and the geometrical distribution of the outgoing neutron flux.

6p bautroibinhyen17 13-02-2017 45 3 Download