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Transparent Metal-Salt-Filled Polymeric Radiation Shields"COR-RA" (colorless atomic oxygen resistant -- radiation shield) is the name of a transparent polymeric material filled with x-ray-absorbing salts of lead, bismuth, cesium, and thorium. COR-RA is suitable for use in shielding personnel against bremsstrahlung radiation from electron-beam welding and industrial and medical x-ray equipment. In comparison with lead-foil and leaded-glass shields that give equivalent protection against x-rays (see table), COR-RA shields are mechanically more durable. COR-RA absorbs not only x-rays but also neutrons and rays without adverse effects on optical or mechanical performance. The formulation of COR-RA with the most favorable mechanical-durability and optical properties contains 22 weight percent of bismuth to absorb x-rays, plus 45 atomic percent hydrogen for shielding against neutrons.
Document ID
20110023863
Acquisition Source
Marshall Space Flight Center
Document Type
Other - NASA Tech Brief
Authors
Edwards, David
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Lennhoff, John
(Triton Systems, Inc. MA, United States)
Harris, George
(Triton Systems, Inc. MA, United States)
Date Acquired
August 25, 2013
Publication Date
July 1, 2003
Publication Information
Publication: NASA Tech Briefs, July 2003
Subject Category
Man/System Technology And Life Support
Report/Patent Number
MFS-31371
Distribution Limits
Public
Copyright
Public Use Permitted.
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