University of Khartoum

Measurements for the Accumulation of Deuterium in Different Materials Using the Neutron Generator

Measurements for the Accumulation of Deuterium in Different Materials Using the Neutron Generator

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Title: Measurements for the Accumulation of Deuterium in Different Materials Using the Neutron Generator
Author: Salah Eldin Ashamalla, Yousif
Abstract: The present work concerns two investigations related to the use of the neutron generator at the Nuclear Science Laboratory, University of Khartoum. The first investigation concerned the determination of the neutron energy with emission angle. As the neutron energy changes with emission angle, and since the cross - section is a function of energy, there is need for accurate knowledge of the neutron energy for precise cross - section measurements. The following two reactions were used for the determination of the neutron energy with emission angle: 90Zr( n, 2n ) 89Zr and 93Nb( n, 2n ) 92Nb. The second investigation concerned the self - target effect of deuterons on various materials. The aim of the investigation was on the one hand to find out the contribution of the self - target effect to the neutron background. The investigation was expected on the other hand to throw light on the behaviour of various structural materials of the fusion reactor under deuterons bombardment. The following self - target reaction was used for the investigation: 2H (d, p) 3H. The materials studied included: B, C, Si, Cd, Cu, Co, Ni, AI, Cu Zn (Brass), Pd, Au, Stainless Steel, Cu Zr (Metallic glass), W, Zn and high Tc. Ceramic. The results indicated three distinct levels of accumulation of deuterium in the various materials: Polycrystalline metals and semiconductors with high accumulation, amorphous boron with medium accumulation and metallic glass and high Tc. Ceramic with lowest accumulation. The results also showed that the self - target neutron background could be decreased by a factor of about 100, comparing to materials with highest and lowest deuterium accumulation.
URI: http://khartoumspace.uofk.edu/handle/123456789/14349
Date: 2015-06-23


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