Atmospheric Transport of X-Rays.
Abstract
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 16, 1970
- Accession Number
- AD0716801
Entities
People
- D. F. Willoughby
- J. A. Lonergan
- J. P. Wondra
- M. J. Nowak
- R. J. Harris Jr.