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Atmospheric Transport of X-Rays

Harris,R. J. , Jr ; Nowak,M. J ; Lonergan,J. A ; Wondra,J. P ; Willoughby,D. F

1970

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Título:
Atmospheric Transport of X-Rays
Autor: Harris,R. J. , Jr ; Nowak,M. J ; Lonergan,J. A ; Wondra,J. P ; Willoughby,D. F
Assuntos: AMERICIUM 241 ; ATMOSPHERE MODELS ; Atmospheric Physics ; COMPUTER PROGRAMMING ; CURVE FITTING ; GE(LI) DETECTORS ; GERMANIUM(LI) DETECTORS ; INTEGRALS ; MONTE CARLO METHOD ; NUMERICAL INTEGRATION ; PHOTONS ; PHOTRAN COMPUTER PROGRAM ; RADIOACTIVE ISOTOPES ; SPECTRUM ANALYZERS ; STATISTICAL DISTRIBUTIONS ; TRANSPORT PROPERTIES ; X RAYS
Notas: DTIC AND NTIS
Descrição: Due to the lack of measured data for checking calculational results, an experimental program was initiated at Gulf General Atomic (GGA) for studying the atmospheric transport properties of X-rays by using liquid nitrogen to simulate air. Measurements of the photon spectrum and angular distribution were made as a function of source-detector separation distance in an 'infinite' medium of liquid nitrogen provided by a large cryogenic dewar. Radioactive isotopes of 241Am, 141Ce, and 203Hg were used as sources of approximately monoenergetic photons with energies of 60 keV, 145 keV and 279 keV, respectively. A 20 cc cm Ge(Li) detector was used to measure photon spectra for energies from approximately 20 keV to the source energy. Measurements were made for source detector distances of 1-15 mfp for each source energy. Transport calculations were made for comparison with the measurements using the PHOTRAN Monte Carlo code and the 1DF discrete ordinates code. (Author)
Data de criação/publicação: 1970
Idioma: Inglês

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Atmospheric Transport of X-Rays

Harris,R. J. , Jr ; Nowak,M. J ; Lonergan,J. A ; Wondra,J. P ; Willoughby,D. F

1970

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