Accession Number : AD0698037

Title :   THE DEVELOPMENT OF A PHOTOTROPIC ANODIZED ALUMINUM FINISH RESPONSIVE TO GAMMA RADIATION.

Descriptive Note : Final technical rept. 1 Apr 66-30 Apr 67,

Corporate Author : NORTH STAR RESEARCH AND DEVELOPMENT INST MINNEAPOLIS MINN

Personal Author(s) : Browning,Myron E. ; Burks,Teman L.

Report Date : JUL 1967

Pagination or Media Count : 79

Abstract : 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)

Descriptors :   (*PHOTOCHROMISM, *GAMMA RAYS), (*RADIATION MONITORS, PHOTOCHROMISM), (*ALUMINUM COATINGS, RADIATION MONITORS), (*DYES, PHOTOCHROMISM), ANODIC COATINGS, FREE RADICALS, RADIATION CHEMISTRY, METHYLENE BLUE, ULTRAVIOLET SPECTRA, VISIBLE SPECTRA, NITROGEN HETEROCYCLIC COMPOUNDS, AMINES

Subject Categories : Radiation and Nuclear Chemistry
      Nuclear Instrumentation

Distribution Statement : APPROVED FOR PUBLIC RELEASE