Optical properties of poly (2,6-Dimethyl-1,4-Phenylene Oxide) film and its potential for a long-term solar ultraviolet dosimeter

Lester, Rick A. and Parisi, Alfio and Kimlin, Michael G. and Sabburg, Jeff (2003) Optical properties of poly (2,6-Dimethyl-1,4-Phenylene Oxide) film and its potential for a long-term solar ultraviolet dosimeter. Physics in Medicine and Biology, 48. pp. 3685-3698. ISSN 0031-9155

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Abstract

The optical properties of poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) film have been characterised in order to develop an alternative method for UV dosimetry with a focus on long-term human exposure measurements. The dynamic range of PPO film was found to extend to 2 MJ/m2 of broadband UV exposure independently of film thickness, providing an exposure range of roughly four summer days at subtropical latitudes. The sensitivity of the film to UV exposure was positively related to film thickness in the 20 to 40 micron range. Films of 40 micron thickness proved to be the most suitable for long-term human UV exposure measurements. The temperature independence of the response of 40 micron PPO film was established from 1.5 to 50 degrees Celcius within a dosimeter response uncertainty of 6.5%. Dose-rate independence was also demonstrated within 8% of the mean dosimeter response. The spectral response approximates the CIE erythemal action spectrum between 300 and 340 nm, with a peak response at 305 nm. A large deviation from this action spectrum was observed at shorter wavelengths. Investigation of the angular response in both the azimuth and altitude planes showed a cosine error of less than 6.2% between 0 and 40 degrees, and did not exceed 13.3% at any angle greater than 40 degrees. These results indicate that PPO film satisfies the requirements for use as a UV dosimeter, and may be employed in long-term human exposure measurements.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Author's version deposited in accordance with the copyright policy of the publisher.
Depositing User: Assoc Prof Alfio Parisi
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 11 Oct 2007 00:36
Last Modified: 02 Jul 2013 22:36
Uncontrolled Keywords: PPO, erythema, dosimeter, UV, action spectrum, solar
Fields of Research (FOR2008): 02 Physical Sciences > 0299 Other Physical Sciences > 029999 Physical Sciences not elsewhere classified
02 Physical Sciences > 0299 Other Physical Sciences > 029904 Synchrotrons; Accelerators; Instruments and Techniques
04 Earth Sciences > 0401 Atmospheric Sciences > 040103 Atmospheric Radiation
URI: http://eprints.usq.edu.au/id/eprint/1164

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