(α,n) reactions in oxide compounds calculated from the R-matrix theory

M. T. Pigni; I. C. Gauld; S. Croft

doi:10.1016/j.pnucene.2019.103130

(α,n) reactions in oxide compounds calculated from the R-matrix theory

M. T. Pigni, I. C. Gauld, S. Croft

Nuclear Data

Research output: Contribution to journal › Review article › peer-review

3 Scopus citations

Abstract

This paper presents an analysis of the neutron yield and energy distribution of neutron source terms generated from the interaction of α-particles with ^17,18O nuclei in fissile actinide compounds. When compared with measured data, the neutron yield and energy distribution data calculated for several isotopic configurations are used to validate the energy-dependent ^17,18O(α,n) cross sections modeled by a set of resonance parameters based on the Reich-Moore approximation of the R-matrix theory. The present analysis shows the fundamental importance of the partial contribution of the (α,n) cross sections to each excited state in determining the shape and magnitude of the calculated neutron spectra as a function of the emerging neutrons.

Original language	English
Article number	103130
Journal	Progress in Nuclear Energy
Volume	118
DOIs	https://doi.org/10.1016/j.pnucene.2019.103130
State	Published - Jan 2020

Funding

This work was supported by the US Department of Energy National Nuclear Security Administration Office of Defense Nuclear Nonproliferation Research and Development NA-22.

Funders	Funder number
Office of Defense Nuclear Nonproliferation

Keywords

Neutron energy spectra
Neutron yield
Nuclear data
R-matrix theory

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10.1016/j.pnucene.2019.103130

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title = "(α,n) reactions in oxide compounds calculated from the R-matrix theory",

abstract = "This paper presents an analysis of the neutron yield and energy distribution of neutron source terms generated from the interaction of α-particles with 17,18O nuclei in fissile actinide compounds. When compared with measured data, the neutron yield and energy distribution data calculated for several isotopic configurations are used to validate the energy-dependent 17,18O(α,n) cross sections modeled by a set of resonance parameters based on the Reich-Moore approximation of the R-matrix theory. The present analysis shows the fundamental importance of the partial contribution of the (α,n) cross sections to each excited state in determining the shape and magnitude of the calculated neutron spectra as a function of the emerging neutrons.",

keywords = "Neutron energy spectra, Neutron yield, Nuclear data, R-matrix theory",

author = "Pigni, {M. T.} and Gauld, {I. C.} and S. Croft",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2020",

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doi = "10.1016/j.pnucene.2019.103130",

language = "English",

volume = "118",

journal = "Progress in Nuclear Energy",

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T1 - (α,n) reactions in oxide compounds calculated from the R-matrix theory

AU - Pigni, M. T.

AU - Gauld, I. C.

AU - Croft, S.

PY - 2020/1

Y1 - 2020/1

N2 - This paper presents an analysis of the neutron yield and energy distribution of neutron source terms generated from the interaction of α-particles with 17,18O nuclei in fissile actinide compounds. When compared with measured data, the neutron yield and energy distribution data calculated for several isotopic configurations are used to validate the energy-dependent 17,18O(α,n) cross sections modeled by a set of resonance parameters based on the Reich-Moore approximation of the R-matrix theory. The present analysis shows the fundamental importance of the partial contribution of the (α,n) cross sections to each excited state in determining the shape and magnitude of the calculated neutron spectra as a function of the emerging neutrons.

AB - This paper presents an analysis of the neutron yield and energy distribution of neutron source terms generated from the interaction of α-particles with 17,18O nuclei in fissile actinide compounds. When compared with measured data, the neutron yield and energy distribution data calculated for several isotopic configurations are used to validate the energy-dependent 17,18O(α,n) cross sections modeled by a set of resonance parameters based on the Reich-Moore approximation of the R-matrix theory. The present analysis shows the fundamental importance of the partial contribution of the (α,n) cross sections to each excited state in determining the shape and magnitude of the calculated neutron spectra as a function of the emerging neutrons.

KW - Neutron energy spectra

KW - Neutron yield

KW - Nuclear data

KW - R-matrix theory

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U2 - 10.1016/j.pnucene.2019.103130

DO - 10.1016/j.pnucene.2019.103130

M3 - Review article

AN - SCOPUS:85071916044

SN - 0149-1970

VL - 118

JO - Progress in Nuclear Energy

JF - Progress in Nuclear Energy

M1 - 103130

ER -

(α,n) reactions in oxide compounds calculated from the R-matrix theory

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