Characterization of a neutron-beta counting system with beta-delayed neutron emitters
Author
Calvino, E.
Valencia, E.
Cano-Ott, D.
Caballero-Folch, R.
Tarifeno-Saldivia, A.
Agramunt, J.
Tain, J. L.
Gomez-Hornillos, M. B.
Garcia, A. R.
Albiol, E.
Algora, A.
Saastamoinen, A.
Rubio, B.
Rissanen, J.
Riego, A.
Reponen, M.
Pretel, C.
Podolyak, Zs.
Penttila, H.
Moore, I.
Mason, P. J. R.
Martinez, T.
Kucuk, L.
Kolhinen, V.
Kankainen, A.
Jordan, M. D.
Jokinen, A.
Hakala, H.
Gorlychev, V.
Gorelov, D.
Gelletly, W.
Eronen, T.
Domingo-Pardo, C.
Cortes, G.
Metadata
Show full item recordAbstract
A new detection system for the measurement of beta-delayed neutron emission probabilities has been characterized using fission products with well known beta-delayed neutron emission properties. The setup consists of BELEN-20, a 4 pi-neutron counter with twenty He-3 proportional tubes arranged inside a large polyethylene neutron moderator, a thin Si detector for beta counting and a self-triggering digital data acquisition system. The use of delayed-neutron precursors with different neutron emission windows allowed the study of the effect of energy dependency on neutron, beta and beta-neutron rates. The observed effect is well reproduced by Monte Carlo simulations. The impact of this dependency on the accuracy of neutron emission probabilities is discussed. A new accurate value of the neutron emission probability for the important delayed-neutron precursor I-137 was obtained, P-n = 7.76(14)%. (C) 2015 Elsevier B.V. All rights reserved.
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