Three-Dimensional Optical Random Access Memory Materials for Use as Radiation Dosimeters

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cullumetal2000threedimensionalopticalrandomaccessmemorymaterialsforuseasradiationdosimeters.pdf (306.88 KB)

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https://pubs.acs.org/doi/10.1021/ac000638t

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https://doi.org/10.1021/ac000638t
 http://hdl.handle.net/11603/36054

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UMBC Chemistry & Biochemistry Department
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https://orcid.org/0000-0002-5250-8290

Date

2000-10-13

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journal articles
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Citation of Original Publication

Cullum, Brian M., Joel Mobley, James S. Bogard, Marko Moscovitch, Gary W. Phillips, and Tuan Vo-Dinh. “Three-Dimensional Optical Random Access Memory Materials for Use as Radiation Dosimeters.” Analytical Chemistry 72, no. 22 (November 1, 2000): 5612–17. https://doi.org/10.1021/ac000638t.

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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Abstract

This article describes the development of the first three-dimensional optical random access memory (3D-ORAM) material and readout system for monitoring energetic neutrons. Two different photochromic dyes, 5‘-chloro-6-nitro-1‘,3‘,3‘-trimethylspiro-[2H-1-benzopyran-2,2‘-indoline] (spirobenzopyran) and anthracene, have been investigated for use in these 3-D ORAM dosimeter materials. These dyes were immobilized in a poly(methyl methacrylate) support, and the resulting dosimeter materials were irradiated with neutrons from a Cf-252 source. Fluorescence measurements from the dosimeter show a dramatic decrease in the overall fluorescence intensity of the 3D-ORAM dosimeter exposed to the Cf-252, relative to a nonirradiated dosimeter. In addition, a two-photon excitation readout system has been developed for determining characteristics of the radiation that are necessary for estimating dose.