Choice of boron shield in epithermal neutron activation determinations

Add time:09/09/2019    Source:sciencedirect.com

Boron trioxide, boron nitride, boron carbide and elemental boron giving different boron surface densities have been used as neutron shields in epithermal neutron activation determinations. Boron ratios and advantage factors for 29 nuclides have been determined. A new expression of the advantage factor has been derived from statistics of radioactive decay viewpoint. A real improvement, in comparison with classical neutron activation methods, can be obtained for the determination of As, Br, Cd, I, Mo. Sb, Sn, Th, W and U by use of boron shields.

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