THE STRUCTURE OF THE $gamma$-FIELD OF A CESIUM-137 SOURCE (in Russian)
The angular spectrum function of scattered gamma radiation from an infinite, isotropic plane /sup 137/Cs source, having an E/sub 0/ = 0.861 Mev in an air-equivalent medium, was investigated by the Monte Carlo method at distances corresponding to 0.5, 1, and 2 mean free paths (MFP) from it. The surface activity was assumed to be 1 quantum/cm/sup 2/ sec. At 0.5 MFP from the source the chief contribution of the scattered radiation was noted at a body angle of about 75 deg ; at l MFP the maximum was located at 60 deg ; and at 2 MFP it was found at 0 deg . At the shortest distance, carrying out the observations under 0 deg , in the direction of normal, a peak was noted at the 0.3-Mev region in the energy spectrum; this was due to the first-generation gamma quarta emitted at about 70 deg . The integrated spectrum of the plane source was similar to the integrated spectra of point sources in a homogeneous medium. The buildup factors calculated agreed well with the values reported by H. Goldstein. (TTT)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-18-018898
- OSTI ID:
- 4026084
- Journal Information:
- At. Energ. (USSR), Journal Name: At. Energ. (USSR) Vol. Vol: 16
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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