A new label dosimetry system based on pentacosa-diynoic acid monomer for low dose applications

作者：Abdel Fattah A A; Abdel Rehim F; Soliman Y S^*

来源：Radiation Physics and Chemistry, 2012, 81(1): 70-76.

DOI：10.1016/j.radphyschem.2011.08.011

• Label dosimetry
• 10,12-Pentacosa-diynoic acid
• Polyvinyl butyral
• Reflectance measurements
• Colorimeter

The dosimetric characteristics of gamma-radiation sensitive labels based on polyvinyl butyral (PVB) and a conjugated diacetylene monomer, 10,12-pentacosa-diynoic acid (PCDA) have been investigated using reflectance colorimeter. Two types of labels (colourless and yellow) based on PCDA monomer were prepared using an Automatic Film Applicator System. Upon gamma-ray exposure, the colourless label turns progressively blue, while the yellow colour label turns to green then to dark blue. The colour intensity of the labels is proportional to the radiation absorbed dose. The useful dose range was 15 Gy-2 kGy depending on PCDA monomer concentration. The expanded uncertainty of dose measurement of the colourless label was 6.06 (2 sigma).

• 出版日期2012-1