Skyshine Contribution to Gamma Ray Background Between 0 and 4 MeV | |
Mitchell, Allison L. ; Borgardt, James D. ; Kouzes, Richard T. | |
关键词: GAMMA RADIATION; BACKGROUND RADIATION; RADIATION DETECTION; SOLAR RADIATION; EVALUATION skyshine; gamma ray background; cosmic rays; radiation detection; | |
DOI : 10.2172/990599 RP-ID : PNNL-18666 PID : OSTI ID: 990599 Others : Other: 400904120 Others : TRN: US1007510 |
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美国|英语 | |
来源: SciTech Connect | |
【 摘 要 】
Natural gamma-ray background is composed of four components; which include cosmic rays, cosmic ray produced atmospheric activity, terrestrial sources, and skyshine from terrestrial sources. Skyshine is radiation scattered from the air above a source that can produce a signal in radiation detection instrumentation. Skyshine has been studied for many years but its contribution to the natural background observed in a detector has not been studied. A large NaI(Tl) detector was used to investigate each of the four components of the natural background using a series of 48-hour measurements and appropriate lead shielding configured to discriminate contributions from each component. It was found that while the contribution from skyshine decreases rapidly with energy, it represents a significant portion of the background spectrum below ~500keV. A similar campaign of measurements using a HPGe detector is underway.
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RO201705170001325LZ | 1252KB | download |