THE DIFFUSION LENGTH OF THERMAL NEUTRONS IN HEAVY WATER CONTAINING LITHIUM CARBONATE
作者:
H. G. Hereward,
H. R. Paneth,
G. C. Laurence,
B. W. Sargent,
A. M. Munn,
期刊:
Canadian Journal of Research
(NRC Available online 1947)
卷期:
Volume 25a,
issue 1
页码: 26-41
ISSN:1923-4287
年代: 1947
DOI:10.1139/cjr47a-003
出版商: NRC Research Press
数据来源: NRC
摘要:
The density distribution of thermal neutrons was measured with a small boron trifluoride chamber in a cylindrical tank containing 113 litres of heavy water in which lithium carbonate was dissolved. The diffusion length was found to be 22.7 cm. in this solution containing 7.70 × 10−4atoms of lithium per molecule of heavy water (99.4 atom % D). After corrections were applied for the capture of neutrons in the heavy water and light hydrogen, the capture cross-section of lithium was found to be 59 × 10−24cm.2per atom for neutrons of standard velocity 2200 m. per sec. from the measured diffusion length and known transport mean free path.
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