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Type: Artigo de periódico
Title: The Use Of The U(n,f) Reaction Dosimetry In The Determination Of The λf Value Through Fission-track Techniques
Author: Guedes S.
Hadler J.C.
Iunes P.J.
Zuniga A.
Tello C.A.
Paulo S.R.
Abstract: A new set of determinations of the decay constant for spontaneous fission of 238U, λf, using mica-uranium sandwich and thin films of natural uranium is presented. A value of λf = (8.37±0.17) × 10-17 a-1 has been determined. The use of uranium-based neutron dosimetry for the measurement of λf through fission-track techniques is discussed. Particularly, the λf measurement by Roberts et al. (Phys. Rev. 174 (1968) 4847), is analyzed, showing that the value obtained by these authors (7.03 × 10-17 a-1) underestimated λf. It is concluded that the dosimetry based on U(n,f) reaction does not support a λf value around 7 × 10-17 a-1 determined by various authors using mica-uranium sandwich. © 2002 Elsevier Science B.V. All rights reserved.
Rights: fechado
Identifier DOI: 10.1016/S0168-9002(02)01630-3
Date Issue: 2003
Appears in Collections:Unicamp - Artigos e Outros Documentos

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