Energy distribution of the neutron flux measurements at the Chilean Reactor RECH-1 using multi-foil neutron activation and the Expectation Maximization unfolding algorithm

被引：8

作者：

Molina, F. ^{[1
]}

Aguilera, P. ^{[1
,2
]}

Romero-Barrientos, J. ^{[1
,3
]}

Arellano, H. F. ^{[3
]}

Agramunt, J. ^{[4
]}

Medel, J. ^{[1
]}

Morales, J. R. ^{[2
]}

Zambra, M. ^{[1
,5
]}

机构：

[1] Comis Chilena Energia Nucl, Nueva Bilbao 12501, Santiago, Chile

[2] Univ Chile, Fac Ciencias, Dept Fis, Las Palmeras 3425, Santiago, Chile

[3] Univ Chile, Dept Fis FCFM, Ave Blanco Encalada 2008, Santiago, Chile

[4] CSIC Univ Valencia, Inst Fis Corpuscular IFIC, Apdo 22085, E-46071 Valencia, Spain

[5] Univ Diego Portales, Manuel Rodriguez 415, Santiago, Chile

来源：

APPLIED RADIATION AND ISOTOPES | 2017年 / 129卷

关键词：

Neutron activation; Expectation maximization; Experimental reactor neutron flux distribution; NUCLEAR-DATA; DECAY;

D O I：

10.1016/j.apradiso.2017.08.001

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We present a methodology to obtain the energy distribution of the neutron flux of an experimental nuclear reactor, using multi-foil activation measurements and the Expectation Maximization unfolding algorithm, which is presented as an alternative to well known unfolding methods such as GRAVEL. Self-shielding flux corrections for energy bin groups were obtained using MCNP6 Monte Carlo simulations. We have made studies at the at the Dry Tube of RECH-1 obtaining fluxes of 1.5(4) x 10(13) cm(-2) s(-1) for the thermal neutron energy region, 1.9(5) x 10(12) cm(-2) s(-1) for the epithermal neutron energy region, and 4.3(11) x 10(11) cm(-2) s(-1) for the fast neutron energy region.

引用

页码：28 / 34

页数：7

共 10 条

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[2] Measurement of the neutron flux at spallation sources using multi-foil activation
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[3] Measurements of Neutron Fields in a Wide Energy Range Using Multi-Foil Activation Analysis
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NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2001, 457 (03): : 617 - 626
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, 2016, 307 (03) : 2133 - 2136
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ANNALS OF NUCLEAR ENERGY, 2012, 50 : 50 - 55
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