Letters to Editor | Published:

Collisions between Neutrons and Diplons

Subjects

Abstract

WHEN a stream of neutrons passes through a sheet of matter, neutrons are lost from the beam both by absorption and scattering. The latter can be avoided by placing the source of neutrons in the centre of a spherical scatterer, since with this arrangement as many neutrons must be scattered into the beam as are lost from it by scattering. In these circumstances any diminution of the number of neutrons in the beam must be attributed to absorption by the material of the sphere. The usual method of estimating the intensity of a neutron beam is to measure the induced radioactivity produced in a thin layer of matter such as aluminium or rhodium by means of a tube counter. The radioactivity so produced is proportional to the length of the neutron path in the detecting substance and will be given by k.n.d. sec m (k, number of radioactive atoms produced per cm. path; n, number of neutrons in the beam; d, thickness of the sheet; and m, the mean angle of incidence).

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1

    NATURE, 135, 654, April 27, 1935.

Download references

Author information

Rights and permissions

To obtain permission to re-use content from this article visit RightsLink.

About this article

Publication history

  • Issue Date

DOI

https://doi.org/10.1038/135903b0

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.