Abstract

The neutron spectra from the interaction of 14-Mev neutrons with a number of elements have been determined by nuclear plate techniques. The plates were exposed to neutrons from the bombardment of a Zr-T target by 200-kev deuterons when the target was as nearly as possible isolated from all scattering material and when the target was surrounded by a spherical shell of the element to be investigated. The variation of $F({E}_{n})$, the number of emitted neutrons per unit energy interval with energy (${E}_{n}$), appears to be Maxwellian in the region 0.5 to 4.0 Mev and may be represented by $F({E}_{n})d{E}_{n}=C{E}_{n}{e}^{\ensuremath{-}\frac{{E}_{n}}{T}}d{E}_{n}.$

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