Measurement of the neutron flux at spallation sources using multi-foil activation

被引：38

作者：

Chiesa, Davide ^{[1
,2
]}

Nastasi, Massimiliano ^{[1
,2
]}

Cazzaniga, Carlo ^{[3
]}

Rebai, Marica ^{[1
,2
,4
]}

Arcidiacono, Laura ^{[5
,6
,7
,8
]}

Previtali, Ezio ^{[2
]}

Gorini, Giuseppe ^{[1
,2
,4
]}

Frost, Christopher D. ^{[3
]}

机构：

[1] Univ Milano Bicocca, Dept Phys G Occhialini, Piazza Sci 3, I-20126 Milan, Italy

[2] INFN Sect Milano Bicocca, Piazza Sci 3, I-20126 Milan, Italy

[3] STFC, Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[4] IFP CNR, Via Cozzi 53, I-20125 Milan, Italy

[5] Museo Stor Fis, Piazza Viminale 1, I-00184 Rome, Italy

[6] Ctr Studi & Ric Enrico Fermi, Piazza Viminale 1, I-00184 Rome, Italy

[7] Univ Roma Tor Vergata, NAST Ctr, Via Ric Sci 1, I-00133 Rome, Italy

[8] UCL, Inst Archaeol, 31-34 Gordon Sq, London WC1H 0PY, England

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2018年 / 902卷

关键词：

Neutron spectrum unfolding; Activation analysis; Fast neutrons; Spallation sources; Gamma-ray and neutron spectroscopy; CROSS-SECTIONS; NUCLEAR-DATA; ENDF/B-VII.1; STATISTICS; SIMULATION; DETECTORS; SPECTRUM;

D O I：

10.1016/j.nima.2018.06.016

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Activation analysis is used in this work to measure the flux of a fast neutron beamline at a spallation source over a wide energy spectrum, extending from thermal to hundreds of MeV. The experimental method is based on the irradiation of multiple elements and measurements of activation gamma-lines using a High Purity Germanium detector. The method for data analysis is then described in detail, with particular attention to the evaluation of uncertainties. The reactions have been chosen so to cover the whole energy range, using mainly (n, gamma)for thermal and epithermal neutrons, and threshold reactions for the fast region. The variety of these reactions allowed for the unfolding of the neutron spectrum, using an algorithm based on a Bayesian statistical model, and limited correlations have been found between the energy groups.

引用

页码：14 / 24

页数：11

共 22 条

[21] Measurement of 232Th(n, γ) and 232Th() cross-sections at neutron energies of 13.5, 15.5 and 17.28 MeV using neutron activation techniques
Mukerji, Sadhana
Naik, H.
Suryanarayana, S. V.
Chachara, S.
Shivashankar, B. S.
Mulik, V.
Crasta, Rita
Samanta, Sudipta
Nayak, B. K.
Saxena, A.
Sharma, S. C.
Bhagwat, P. V.
Rasheed, K. K.
Jindal, R. N.
Ganesan, S.
Mohanty, A. K.
Goswami, A.
Krishnani, P. D.
PRAMANA-JOURNAL OF PHYSICS, 2012, 79 (02): : 249 - 262
[22] Measurement of the 238U(n,γ)239U and 238U(n,2n)237U Reaction Cross Sections Using a Neutron Activation Technique at Neutron Energies of 8.04 and 11.90 MeV
Crasta, R.
Ganesh, S.
Naik, H.
Goswami, A.
Suryanarayana, S. V.
Sharma, S. C.
Bhagwat, P. V.
Shivashankar, B. S.
Mulik, V. K.
Prajapati, P. M.
NUCLEAR SCIENCE AND ENGINEERING, 2014, 178 (01) : 66 - 75

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