SYMPOSIA PAPER Published: 01 January 1994

Proton Recoil Spectroscopy 400 Meters from a Fission Neutron Source


Neutron kerma and spectrum measurements have been made at the U.S. Army Pulse Radiation Facility (APRF) to 400m in an air-over-ground geometry from a fission neutron source and have been compared to Monte Carlo transport calculations. The neutron spectra measurements were made using a rotating neutron spectrometer. This spectrometer consists of four spherical proton-recoil detectors mounted on a common rotating base. Detector radius, gas composition, and pressure have been varied to allow sensitivity over a neutron range of 50 keV to 4.5 MeV. Neutron kerma was determined by using the Kerr soft-tissue kerma factors. Measured neutron kerma agreed with the calculated neutron kerma to within 5%. Comparisons with other neutron spectrometers such as NE213 and Bonner Spheres are presented and agreement between the different spectrometers is better than 20%.

Author Information

Stanka, MB
Combat Systems Test Activity, STECS-NE Aberdeen Proving Ground, MD, USA
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Developed by Committee: E10
Pages: 300–309
DOI: 10.1520/STP15123S
ISBN-EB: 978-0-8031-5281-6
ISBN-13: 978-0-8031-1899-7