Accession Number:

AD0770424

Title:

A New Approach to the Measurement of the Small-Angle Elastic Scattering of Fast Neutrons,

Descriptive Note:

Corporate Author:

BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD

Personal Author(s):

• Bucher,William P.
• Hollandsworth,Clinton E.
• Lamoreaux,Richard D.

Report Date:

1973-10-01

Pagination or Media Count:

45.0

Abstract:

The measurement of the small-angle scattering of 5-15 MeV neutrons from low-A nuclei requires an experimental technique of high sensitivity. In order to determine the most suitable technique, various scattering geometries are studied and compared. The experimental approach found optimum involves the use of an unusual scattering geometry for which a four-fold collimator-detector array with fixed collimating channels has been especially designed and constructed. The principles of measurements in this geometry are developed and discussed in detail. From performance tests with the collimator-detector array, the acceptances of the collimating channels and the overall experimental sensitivity are determined. Preliminary measurements are presented of the 7.55 MeV elastic cross section of 0, Al, Fe, Sn, and Pb for neutron scattering in the angular range 2.5 to 15 degrees. Author

Descriptors:

• ELASTIC SCATTERING
• OXYGEN
• ALUMINUM
• IRON
• TIN
• LEAD(METAL)

Subject Categories:

• Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE