Estimation of uncertainty in lead spallation particle multiplicity and its propagation to a neutron energy spectrum
Estimation of uncertainty in lead spallation particle multiplicity and its propagation to a neutron energy spectrum
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铅散裂粒子多重性的不确定性估计及其传播到中子能谱
DOI:
10.1080/00223131.2019.1671912
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发表时间:
2019
影响因子:
1.2
通讯作者:
Meigo Shin-Ichiro
中科院分区:
文献类型:
--
作者:
Iwamoto Hiroki;Meigo Shin-Ichiro
This paper presents an approach to uncertainty estimation of spallation particle multiplicity of lead (natPb), primarily focusing on proton-induced spallation neutron multiplicity (xpn) and its propagation to a neutron energy spectrum. The xpn uncertainty is estimated from experimental proton-induced neutron-production double-differential cross-sections (DDXs) and model calculations with the Particle and Heavy Ion Transport code System (PHITS). Uncertainties in multiplicities for (n, xn),(p, xp), and (n, xp) reactions are then inferred from the estimated xpn uncertainty and the PHITS calculation. Using these uncertainties, uncertainty in a neutron energy spectrum produced from a thick natPb target bombarded with 500 MeV proton beams, measured in a previous experiment, is quantified by a random sampling technique, and propagation to the neutron energy spectrum is examined. Relatively large uncertainty intervals (UIs) are observed outside the lower limit of the measurement range, which is prominent in the backward directions. Our findings suggest that a reliable assessment of spallation neutron energy spectra requires systematic DDX experiments for detector angles and incident energies below 100 MeV as well as neutron energy spectrum measurements at lower energies below∼ 1.4 MeV with an accuracy below the quantified UIs.
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DOI:
10.1016/s0168-9002(99)00282-x
发表时间:
1999
影响因子:
1.4
作者:
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DOI:
10.1051/epjconf/201715301016
发表时间:
2017
期刊:
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影响因子:
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作者:
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通讯作者:
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The European Physical Journal A - Hadrons and Nuclei
影响因子:
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通讯作者:
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影响因子:
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