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Type: Artigo de periódico
Title: The use of the U(n,f) reaction dosimetry in the determination of the lambda(f) value through fission-track techniques
Author: Guedes, S
Hadler, JC
Iunes, PJ
Zuniga, A
Tello, CA
Paulo, SR
Abstract: A new set of determinations of the decay constant for spontaneous fission of (238)U, lambda(f), using mica-uranium sandwich and thin films of natural uranium is presented. A value of lambda(f) (8.37+/-0.17) x 10(-17) a(-1) has been determined. The use of uranium-based neutron dosimetry for the measurement of lambda(f) through fission-track techniques is discussed. Particularly, the lambda(f) measurement by Roberts et al. (Phys. Rev. 174 (1968) 4847), is analyzed, showing that the value obtained by these authors (7.03 x 10(-17) a(-1)) underestimated lambda(f). It is concluded that the dosimetry based on U(n,f) reaction does not support lambda(f) value around 7 x 10(-17)a(-1) determined by various authors using mica-uranium sandwich. (C) 2002 Elsevier Science B.V. All rights reserved.
Subject: (238)U
spontaneous fission
decay constant
neutron dosimetry
thin films
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/S0168-9002(02)01630-3
Date Issue: 2003
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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