Accession Number : ADA141791

Title :   Recent Re-Measurement of Neutron and Gamma-Ray Spectra 1080 Meters from the APRD (Army Pulse Radiation Division) Critical Facility,

Corporate Author : DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)

Personal Author(s) : Robitaille,H A ; Hoffarth,B E

PDF Url : ADA141791

Report Date : Jan 1984

Pagination or Media Count : 123

Abstract : Previously reported measurements of long-range air-transported neutron and gamma-ray spectra from the fast-critical facility at the US Army Aberdeen Proving Ground have been supplemented recently at the 1080-meter position. The results of these determinations are presented herein and compared to several recent calculations from other research establishments. In addition, a summary of all dosimetric measurements obtained in the period 1979-1982 are appended, as are new determinations of APRD soil composition. Integral quantities such as neutron and gamma-ray kermas are very well predicted by the latest calculations, however there still exist significant spectral differences. At short ranges calculated neutron spectra are somewhat softer than experimental measurements, but at the farthest range of 1080 meters agreement is surprisingly good. Gamma-ray spectra remain well-calculated at all ranges. (Author)

Descriptors :   *Neutron spectrum, *Gamma ray spectra, Radiation measuring instruments, Dosimetry, Measurement, Environments, Spectroscopy, Spectrometers, Scintillation counters, Neutron flux, Propagation, Atmospheres, Soils, High temperature, Humidity, Gamma rays, Neutrons, Army facilities, Experimental data, Canada

Subject Categories : Nuclear Instrumentation
      Radioactiv, Radioactive Wastes & Fission Prod
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE