Accession Number : AD0670479

Title :   GAMMA-RAY PULSE-HEIGHT SPECTRA: FORMATION OF A RESPONSE MATRIX FOR ITERATIVE UNFOLDING,

Corporate Author : NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF

Personal Author(s) : Sam,Daniel ; Bunney,Leland R. ; Heater,Drexel C.

Report Date : 20 NOV 1967

Pagination or Media Count : 45

Abstract : The gamma-ray spectra of fission products resulting from nuclear weapon detonations provide basic data required in fallout exposure and shielding calculations. One method for obtaining the gamma-ray spectra is the application of the iterative unfolding technique to the measured pulse-height spectra. This technique, however, requires the construction of a response matrix which contains a series of response functions of the detector assembly to various gamma-ray energies. This report describes the essential steps in the construction of a response matrix, having the dimensions 100 energy bins and 1024 channels, used to obtain the complex gamma-ray spectra from the experimental pulse-height spectra. The photons of interest have an energy range extending from 0.060 to 5.00 Mev. The report also presents the associated computer programs for generating and using the response matrix. The results of unfolding of synthesized pulse-height spectra having a known number of gamma rays of known energy are presented. The computer programs are written in Fortran II language for use with an IBM-704 computer. (Author)

Descriptors :   (*NUCLEAR WEAPONS, GAMMA RAYS), (*FISSION PRODUCTS, RADIATION MEASURING INSTRUMENTS), DETONATIONS, FALLOUT, NUCLEAR ENERGY, PULSE HEIGHT ANALYZERS, RESPONSE, DETECTORS, ENERGY, SHIELDING, PHOTONS, COMPUTER PROGRAMS, STATISTICAL PROCESSES, MATHEMATICAL ANALYSIS

Subject Categories : Radioactiv, Radioactive Wastes & Fission Prod
      Nuclear Weapons

Distribution Statement : APPROVED FOR PUBLIC RELEASE