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- W137712504 abstract "By measuring the spatial distribution of the neutron density in H/sub 2/ O, the power and the average energy of the neutron sources Rn-Be, Rn-B, Rn-C, Rn- CaF/sub 2/, Rn-Mg, Rn-Al, and Rn-Si (the alpha ,n reaction) were determined. The absolute neutron yield from the various sources was determined by comparing the integral distributions of the slowed-down neutrons from the investigated and from a standard Ra--Be source. The mean energy of the neutron spectra was estimated from the magnitude of the relaxation length (L), determined from the measurements of the distribution of the density of the neutrons at distances greater than 20 cm (~e/sup -x/L/). The neutron yield varies from 1.5 x 10/sup -4/ /microcurie of Rn for Be to 37/microcurie of Rn for C. The average energy of the spectra of the investigated sources lies in the iuterval from 2.0 to 4.7 Mev. The relaxation length depends linearly on the maximum energy of the neutron spectra." @default.
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- W137712504 date "1957-01-01" @default.
- W137712504 modified "2023-09-27" @default.
- W137712504 title "RADON NEUTRON SOURCES" @default.
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