Title
Spontaneous-fission decay constant of <sup>238</sup>U measured by nuclear track techniques without neutron irradiation
Date Issued
01 October 2003
Access level
metadata only access
Resource Type
journal article
Author(s)
Guedes S.
Hadler N. J.C.
Sarkis J.E.S.
Oliveira K.M.G.
Kakazu M.H.
Iunes P.J.
Saiki M.
Paulo S.R.
Universidad Estadual de Campinas
Abstract
A value of the decay constant for spontaneous fission of 238U, λf, determined by particle-track detector techniques, is presented. The main source of systematic error in fission-track measurements of λf, the so called "neutron dosimetry", has been avoided. Instead of calibrating the neutron source and the usual mica detector through tracks of 235U fission induced by thermal neutrons, spontaneous-fission tracks and alpha-particle tracks of 238U and 242Pu were used. A value of λf=(8.66± 0.38)·10-17 y-1 has been obtained.
Start page
117
End page
122
Volume
258
Issue
1
Language
English
OCDE Knowledge area
Neurociencias
IngenierÃa relacionada con la energÃa nuclear
Scopus EID
2-s2.0-0142122507
Source
Journal of Radioanalytical and Nuclear Chemistry
ISSN of the container
02365731
Sponsor(s)
The São Paulo State Research Foundation (FAPESP), through a doctoral grant, process number 96/06612-0, supported this work. The authors are grateful to the Radiological Protection team of the Instituto de Pesquisas Energéticas e Nucleares (IPEN), for closely accompanying the procedures involving the radioactive material. Authors are indebted to the referee, Dr. Ilona HUNYADI (Institute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen) for her helpful and constructive comments.
Sources of information:
Directorio de Producción CientÃfica
Scopus