Spontaneous-fission decay constant of 238U measured by nuclear track techniques without neutron irradiation.

Autor:	Guedes, S., Hadler N., J. C., Sarkis, J. E. S., Oliveira, K. M. G., Kakazu, M. H., Iunes, P. J., Saiki, M., Tello S., C. A., Paulo, S. R.
Předmět:	SPONTANEOUS fission NUCLEAR fission RADIOACTIVE decay NUCLEAR track detectors NUCLEAR counters NEUTRON irradiation NUCLEAR reactions
Zdroj:	Journal of Radioanalytical & Nuclear Chemistry; Sep2003, Vol. 258 Issue 1, p117-122, 6p
Abstrakt:	A value of the decay constant for spontaneous fission of 238U, lf, determined by particle-track detector techniques, is presented. The main source of systematic error in fission-track measurements of lf, 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 lf = (8.66±0.38).10-17 y-1 has been obtained. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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