Polymer gel dosimeter based on itaconic acid

Appl Radiat Isot. 2015 Nov:105:98-104. doi: 10.1016/j.apradiso.2015.07.042. Epub 2015 Jul 31.

Abstract

A new polymeric dosimeter based on itaconic acid and N, N'-methylenebisacrylamide was studied. The preparation method, compositions of monomer and crosslinking agent and the presence of oxygen in the dosimetric system were analyzed. The resulting materials were irradiated with an X-ray tube at 158cGy/min, 226cGymin and 298cGy/min with doses up to 1000Gy. The dosimeters presented a linear response in the dose range 75-1000Gy, sensitivities of 0.037 1/Gyat 298cGy/min and an increase in the sensitivity with lower dose rates. One of the most relevant outcomes in this study was obtaining different monomer to crosslinker inclusion in the formed gel for the dosimeters where oxygen was purged during the preparation method. This effect has not been reported in other typical dosimeters and could be attributed to the large differences in the reactivity among these species.

Keywords: Dosimetry; Itaconic acid; Polymer gel; Raman spectroscopy.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acrylamides / chemistry
  • Dose-Response Relationship, Radiation
  • Gels
  • Humans
  • Microscopy, Electron, Scanning
  • Polymethacrylic Acids / chemistry
  • Radiometry / methods*
  • Radiometry / statistics & numerical data
  • Succinates* / chemistry

Substances

  • Acrylamides
  • Gels
  • Polymethacrylic Acids
  • Succinates
  • N,N'-methylenebisacrylamide
  • itaconic acid