ISSN:
1573-8205
Source:
Springer Online Journal Archives 1860-2000
Topics:
Energy, Environment Protection, Nuclear Power Engineering
,
Physics
Notes:
Conclusions The results of the present work confirm the usefulness of the extrapolation of activity measurements on18F and126I nuclei formed inside a plastic scintillator irradiated with fast neutrons. Accordingly, plastic scintillators with additions of fluorine or iodine can be successfully used for measuring a neutron flux F. In a stationary field of monoenergetic neutrons or in the case of linear plastic scintillator dimensions significantly smaller than the free path length of a neutron (see Eq. (2)), we have $$F = \frac{{\vartheta A(\vartheta )}}{{\sigma M[1 - \exp ( - \lambda \vartheta )]}},$$ where M denotes the number of fluorine or iodine nuclides in the plastic scintillator. Obviously, when the exposure is not too long, plastic scintillators with fluorine are to be preferred. Let us note that the high energy threshold (above 12 MeV) of the19F(n, 2n)18F reaction makes it possible to use the18F activity to determine the number of primary interactions of 14–15 MeV neutrons with the nuclides of plastic scintillators of even larger dimensions. This is important for dosimetric applications.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01123716
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