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Microprocessor-controlled portable neutron spectrometer

Description: A neutron spectrometer that acquires and unfolds data in the field has been developed for use in the energy range from 1 to 20 MeV. The system includes an NE213 organic scintillation detector, automatic gain stabilization, automatically stabilized pulseshape discrimination, an LSl-11 microprocessor for control and data reduction, and a multichannel analyzer for data acquisition. The system, with the exception of the multichannel analyzer, is mounted in a suitcase 47 by 66 by 23.5 cm. The mass i… more
Date: August 29, 1979
Creator: Hunt, G. F.; Kaifer, R. C.; Slaughter, D. R.; Strout, R. E., II & Rueppel, D. W.
Partner: UNT Libraries Government Documents Department
open access

Displacement Functions for Diatomic Materials

Description: An extension of the methods of Lindhard et at. was used to calculate the total displacement function n/sub ij/(E) for a number of diatomic materials, where n/sub ij/(E) is defined to be the average number of atoms of type j which are displaced from their sites in a displacement cascade initiated by a PKA of type i and energy E. From the n/sub ij/(E) one can calculate the fraction n/sub ij/(E) of the displacements produced by a type i PKA with energy E which are of type j. Values of the n/sub ij… more
Date: January 29, 1979
Creator: Panrkin, D. M. & Coulter, C. A.
Partner: UNT Libraries Government Documents Department
open access

Integral tests of nuclear activation cross sections for /sup 9/Be(d,n) sources, E/sub d/ = 14--40 MeV

Description: Thirty-one neutron cross sections have been extended to 44 MeV for dosimetry applications at high energy accelerator sources. Integral testing in Be(d,n) fields at E/sub d/ = 14, 16, and 40 MeV shows that 22 cross sections are accurate to within +- 10%. An example of routine flux-spectral unfolding and damage analysis is shown with an error analysis. Cross section needs are discussed.
Date: January 29, 1979
Creator: Greenwood, L.R. & Heinrich, R.R.
Partner: UNT Libraries Government Documents Department
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