Diffusion and absorption parameters of heavy water

A pulsed-neutron experiment has been carried out on large systems of reactor grade heavy water. From the infinite medium decay constant the thermal neutron absorption cross-section of pure D 2O is estimated to be 1·274 ± 0·10 mb, and that for deuterium 0·485 ± 0·065 mb. The diffusion coefficient of...

Full description

Saved in:
Bibliographic Details
Published in:Journal of nuclear energy (1967) 1969-01, Vol.23 (1), p.1-16
Main Authors: Silk, M.G., Wade, B.O.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A pulsed-neutron experiment has been carried out on large systems of reactor grade heavy water. From the infinite medium decay constant the thermal neutron absorption cross-section of pure D 2O is estimated to be 1·274 ± 0·10 mb, and that for deuterium 0·485 ± 0·065 mb. The diffusion coefficient of pure D 2O was found to be 0·824 ± 0·0025 cm, in reasonable agreement with other measurements. The experiment was confined to large systems, so that it was not possible to estimate accurately the diffusion cooling coefficient: the value obtained was (12·9 ± 2·7) × 10 5 cm 4 sec −1, significantly greater than most previous values. An examination of all the experimental evidence suggests that the discrepancy may be due to the shape of the moderator.
ISSN:0022-3107
1878-4410
DOI:10.1016/0022-3107(69)90053-7