Crucial importance of correlation between cross sections and angular distributions in nuclear data of 28Si on estimation of uncertainty of neutron dose penetrating a thick concrete

2021 ◽  
pp. 1-6
Author(s):  
Naoki Yamano ◽  
Tsunenori Inakura ◽  
Chikako Ishizuka ◽  
Satoshi Chiba
Keyword(s):  
Cross Sections ◽  
Nuclear Data ◽  
Neutron Dose ◽  
Angular Distributions ◽  
Crucial Importance ◽  
Estimation Of Uncertainty

scholarly journals Covariance Matrices for Differential and Angle-Integrated Neutron-Induced Elastic and Inelastic Scattering Cross Sections of 56Fe

2019 ◽  
Vol 211 ◽  
pp. 07002 ◽  
Author(s):  
Shengli Chen ◽  
David Bernard ◽  
Pascal Archier ◽  
Cyrille De Saint Jean ◽  
Gilles Noguere ◽  
...  
Keyword(s):  
Cross Sections ◽  
Uncertainty Propagation ◽  
Least Square Method ◽  
Nuclear Data ◽  
High Energy ◽  
Least Square ◽  
Angular Distributions ◽  
Model Parameters ◽  
Nuclear Data Library ◽  
Scattering Cross Sections

Correlations between neutron inelastic scatterings angular distributions are not included in the Joint Evaluated Fission and Fusion (JEFF) nuclear data library, while they are key quantities for uncertainty propagation of nuclear data. By reproducing the angle-integrated cross sections and uncertainties of JEFF-3.1.1, the present work obtains covariance matrix between high energy model parameters using the least square method implemented in the CONRAD code. With this matrix, it is possible to generate correlations between angle-integrated cross sections and angular distributions, which are usually presented by Legendre coefficients. As expected, strong correlations are found, for example, between the Legendre coefficients of elastic and first-level-inelastic scatterings and the angle-integrated total, elastic, total inelastic cross sections.

scholarly journals NDPlot - A plotting tool for nuclear data

2020 ◽  
Vol 239 ◽  
pp. 10004
Author(s):  
Yongli Jin ◽  
Xi Tao ◽  
Jimin Wang ◽  
Nengchuan Shu ◽  
Jing Qian ◽  
...  
Keyword(s):  
Cross Sections ◽  
Nuclear Data ◽  
Reaction Cross ◽  
Angular Distributions ◽  
Current Version ◽  
Energy Distributions ◽  
Application System ◽  
Secondary Particles ◽  
Beta Version ◽  
Reaction Cross Sections

NDPlot is an efficient plotting tool for nuclear data. It is not only a plotting tool, but also an integrated application system. The first beta version of NDPlot was released in October 2018. The current version is 0.94 beta. NDPlot can plot experimental and evaluated data of reaction cross sections, angular distributions of secondary particles, energy distributions of secondary particles and product energy-angle distributions etc. It also provides data processing functions such as curve summation capability to meet user’s requirements.

scholarly journals New 23Na evaluation in the resolved resonance range taking into account both differential and double differential experiments

2020 ◽  
Vol 239 ◽  
pp. 11006
Author(s):  
Pierre Tamagno ◽  
Pascal Archier ◽  
Cyrille De Saint Jean ◽  
Gilles Noguère
Keyword(s):  
Angular Distribution ◽  
Cross Sections ◽  
Evaluation Process ◽  
Nuclear Data ◽  
Angular Distributions ◽  
Quantum Numbers ◽  
Nuclear Data Library ◽  
Critical Facilities ◽  
Elastic Angular Distribution ◽  
Level Of Agreement

In 2012 CEA produced a entire new evaluation of sodium nuclear data for the release of the JEFF-3.2 evaluated nuclear data library. During the evaluation process performed with the CONRAD code, several differential measurements (total and discrete inelastic cross-sections) have been used. However double differential data (elastic angular distribution) that were yet available in the EXFOR database were not incorporated in the analysis at that time. The experimental elastic angular distribution were discarded because of it was impossible to obtain a good agreement for both angle-integrated cross-sections and double differential ones. The underlying cause of this disagreement is expected to be due to the attribution of quantum numbers to resonance and related channel amplitudes. Indeed these numbers are imposed during the analysis but impact differently angular distributions and angle-integrated cross-sections. An automated search for an accurate set of quantum numbers has been implemented in order to produce a reliable quantum numbers set. In this paper we present a new evaluation of Na-23 taking into account both differential and double differential measurements. The analysis performed with the CONRAD code reached the level of agreement with experimental data for the total and inelastic cross-sections but this time with a significant improvement for the elastic angular distributions. This new evaluation produced in the ENDF-6 format has then been tested and validated on critical facilities calculation (MASURCA and ZPPR) in different configurations (nominal and voided) in order to assess its performances.

Total Cross Sections and Angular Distributions forπ−pCharge Exchange in the Second and Third Resonance Regions

1964 ◽  
Vol 13 (18) ◽  
pp. 558-562 ◽  
Author(s):  
F. Bulos ◽  
R. E. Lanou ◽  
A. E. Pifer ◽  
A. M. Shapiro ◽  
M. Widgoff ◽  
...  
Keyword(s):  
Cross Sections ◽  
Angular Distributions ◽  
Total Cross Sections

Analysing powers and differential cross sections of (3He,p) reactions on 6Li and 7Li at low energy

1995 ◽  
Vol 73 (1-2) ◽  
pp. 74-84 ◽  
Author(s):  
D. Baddou ◽  
C. Rioux ◽  
R. J. Slobodrian ◽  
J. M. Nelson
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Born Approximation ◽  
Low Energy ◽  
Angular Distributions ◽  
Differential Cross Sections ◽  
Distorted Wave ◽  
Distorted Wave Born Approximation ◽  
Nucleon Transfer ◽  
Cluster Transfer

Angular distributions of the differential cross sections and analysing powers were measured at an energy of 4.6 MeV. The results are compared with the distorted wave Born approximation predictions for two-nucleon transfer and for a deuteron-cluster transfer. The agreement is qualitative at best, and a discussion of alternatives to improve it is presented.

Absolute (γ, p0) and (γ, p1) cross sections and angular distributions for the closed-neutron shell nucleusY89

1980 ◽  
Vol 22 (6) ◽  
pp. 2396-2403 ◽  
Author(s):  
E. Van Camp ◽  
R. Van de Vyver ◽  
H. Ferdinande ◽  
E. Kerkhove ◽  
R. Carchon ◽  
...  
Keyword(s):  
Cross Sections ◽  
Angular Distributions ◽  
Neutron Shell ◽  
Closed Neutron Shell

scholarly journals Nuclear Data for Reactor Physics: Cross sections and level densities in the actinide region

2010 ◽  
Vol 2 ◽  
pp. 12001 ◽  
Author(s):  
J.N. Wilson ◽  
S. Siem ◽  
S.J. Rose ◽  
A. Georgen ◽  
F. Gunsing ◽  
...  
Keyword(s):  
Cross Sections ◽  
Nuclear Data ◽  
Reactor Physics ◽  
Level Densities
Sign in / Sign up

Export Citation Format

Share Document