Abstract
WE have measured the absorption in boron of the neutrons which excite -rays in silver. The arrangement used is shown in Fig. 1. The silver in the form of a hollow cylinder 4 mm. thick surrounding the counter was shielded from the effects of stray neutrons by layers of B4C about 5 mm. thick. After being slowed down by the paraffin block and the thermal neutrons filtered out by a cadmium sheet 0.5 mm. thick, the neutrons passed through the B4C absorber placed directly beneath the silver.
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References
Goldsmith and Rasetti, Phys. Rev., 50, 328 (1936).
Bethe, Phys. Rev., 50, 332 (1936).
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BURHOP, E., HILL, R. & TOWNSEND, A. Selective Absorption of Neutrons in Silver. Nature 138, 1094–1095 (1936). https://doi.org/10.1038/1381094b0
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DOI: https://doi.org/10.1038/1381094b0
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