Multiple scattering effects in 7Li

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Abstract

The differential cross-sections for the production of 0.478 MeV γ-rays following the inelastic scattering of 14 MeV neutrons in large samples of LiF, which will be used in fusion reactor blankets, have been measured. The neutrons were produced using the 3H(d, n)4 α reaction, with the deuterons being accelerated by a 150 kV SAMES type accelerator. In order to reduce the background level the γ-ray signal was gated, osing a time of flight technique based on the α-particle associated with neutron production. Measurements of the γ-ray production differential cross-sections were made for various thicknesses of LiF.

The results were compared to the predictions of the Monte Carlo Computer Code, MORSE, with an agreement of ±11% being achieved. In addition a phenomenological expression was found which is capable of predicting the variation in cross-sections with thickness due to multiple scattering effects to within ±12%.

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Cited by (1)

Supported by a SERC CASE award with UKAEA Culham Laboratories.

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