Abstract
A NEUTRON counter was made of a brass tube 10 cm. long and 1 cm. in diameter, the inner surface being coated with a thin film of borate a few microns thick. The axial collector of the ionization chamber was directly connected to a set of the improved linear amplifier system, which was so carefully mounted that the counting system was perfectly free from the mechanical and electrical disturbances of the surroundings, and gave only two to four clear, natural kicks in an hour. By a series of control experiments with neutrons from a radium-beryllium source (of 10 mgm. radium), it was found very reliable for observing slight variations in the number of kicks under various experimental conditions.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
“Kernphysik”, edited by E. Bretscher, p. 108 ( E. J. Williams ) (Berlin: Julius Springer, 1936).
Bothe, W., and Gentner, W., Naturwiss., 25, 90 and 126 (1937).
Fünfer, E., Naturwiss., 25, 235 (1937).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
ARAKATSU, B., KIMURA, K. & UEMURA, Y. Expulsion of Neutrons from Lead by Cosmic Rays. Nature 140, 277–278 (1937). https://doi.org/10.1038/140277a0
Issue Date:
DOI: https://doi.org/10.1038/140277a0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.
