THE DEVELOPMENT OF A PHOTOTROPIC ANODIZED ALUMINUM FINISH RESPONSIVE TO GAMMA RADIATION.
Final technical rept. 1 Apr 66-30 Apr 67,
NORTH STAR RESEARCH AND DEVELOPMENT INST MINNEAPOLIS MINN
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The present investigation was conducted to establish a phototropic anodized aluminum finish sensitive to gamma radiation. A comprehensive literature search revealed a number of candidate phototropic materials but very little information about gamma radiation response. Because early trials indicated that each candidate phototropic system possessed different dyeing characteristics for an anodic film, time-consuming trials with dyed anodic films were reduced by examining gamma radiation response to solutions of the phototropic materials. Color response could be detected in some systems at radiation levels as low as 20,000 roentgens depending on the dye concentration. Further studies disclosed three systems that have favorable color response to gamma radiation. These included certain triarylmethane dyes, a thiazine dye system, and systems using pH-indicator dyes as dyes per se. Studies of these phototropic dyes revealed that special attention will be required in anodizing, dyeing, and sealing techniques to obtain the best radiation response for the coated specimens. Author
- Radiation and Nuclear Chemistry
- Nuclear Instrumentation