A technique is described for investigation of the ultrasonic attenuation coefficient for evaluation of absorbed dose in polymer gel dosimeters. Using this technique the attenuation coefficient as a function of absorbed dose in PAG and MAGIC polymer gel dosimeters was measured. The ultrasonic attenuation coefficient dose sensitivity for PAG was found to be 2.9±0.3 dB m-1 Gy-1 and for MAGIC gel 4.2 ± 0.3 dB m-1 Gy-1. Unlike previous studies of ultrasonic attenuation in polymer gel dosimeters this technique enables a direct measure of the attenuation coefficient.
|Number of pages||7|
|Journal||Physics in Medicine and Biology|
|Publication status||Published - 2003|