Accession Number:

AD0614451

Title:

THE INTERACTIONS OF 14.6-MEV NEUTRONS IN IRON, LITHIUM-7, AND CARBON.

Descriptive Note:

Technical rept. for 1 Oct 63-30 Sep 64,

Corporate Author:

GENERAL DYNAMICS/FORT WORTH TEX NUCLEAR AEROSPACE RESEARCH FACILITY

Report Date:

1965-03-01

Pagination or Media Count:

128.0

Abstract:

A time-of-flight spectrometer for the measurement of fast-neutron energies has been constructed and used to measure the energy and angular distributions of 14.6-Mev neutrons scattered from Fe and C. The neutron differential cross sections for inelastic scattering from Fe were measured at theta sub CM 50 degrees, 70 degrees, and 115 degrees. The neutron differential cross sections for elastic scattering from C and for inelastic scattering from the first level in C were measured at theta sub CM 47 degrees and found to be 49.6 3.6 and 21.8 1.7 mbster, respectively. Total cross sections for Fe and C were measured as 2.49 0.05 and 1.30 0.02 barns, respectively. The energy and angular distributions of inelastically produced gamma rays from Fe and Li7 were measured using two different types of gamma spectrometers. The differential scattering cross sections for production of the 0.845- and 1.24-Mev gamma rays and for gamma rays in the energy interval 1 E sub gamma 10.5 Mev from Fe were measured for nine angles of emission. The differential cross section for inelastic scattering from the 0.477-Mev level of Li7 was measured as 7.73 0.54 mbster at theta sub CM 90 degrees. The calculated energy levels for Li7 and Fe56, using the collective model, are in good agreement with experimental values. The strong-coupling approximation is shown to be valid in both nuclei. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE