A pulse method of examining the diffusion and thermalization of neutrons in water and ice over a wide range of temperatures

Антонов, А. В.; Granatkin, B. V.; Merkul'ev, Yu.A.; Smolik, Ch.K.

doi:10.1016/0368-3230(62)90116-7

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1969

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“…The experimental values of DO are plotted in figure 7 and compared with the predictions of three models and also with the experimental results of Antonov et al (1962). The errors on the Antonov curve are such that the results are incapable of discrimination between the Nelkin and Radkowsky curves.…”

Section: Discussionmentioning

confidence: 99%

Neutron diffusion measurements in water from 18 to 280$deg$C

Bowen

Scott

1969

J. Phys. D: Appl. Phys.

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The pulsed-neutron method has been used to measure the temperature dependence of both the diffusion constant and the extrapolated end point in water. The measured temperature dependence of the diffusion constant was found to be in good agreement with the theoretical values predicted by the Nelkin kernel.Measurements of the extrapolated end point in a cylinder of diameter 7 in. and height 7 in. gave a value of 0·323 ± 0·013 cm, with a similar result for a 7 in. cubical system. For an 8 in. diameter cylinder 4 in. high, however, the value was 0·465 ± 0·039 cm, a change which would not be expected theoretically. The extrapolated end point was also measured at temperatures up to 250°C. For a 4 in. high cylinder no definite temperature dependence was observed, but in a 16 in. high cylinder there was an increase with temperature from 0·340 ± 0·030 cm at 18°C to 0·469 ± 0·021 cm at 250°C.

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Section: Discussionmentioning

confidence: 99%