Evaluation of a well-type ionization chamber for calibration of HDL and LDR brachytherapy sources
✍ Scribed by Anthony K. Ho; Claudio H. Sibata; Cleber N. deSouza; Robert Castiglione; Kyu H. Shin
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 311 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0958-3947
No coin nor oath required. For personal study only.
✦ Synopsis
The Atomlab 44D well-type ionization chamber is being evaluated for calibration of high dose rate (HDR) D-192 and low dose rate (LDR) Cs-137 sources. The chamber has a flat response (sweet spot) of 20.5% along approximately 3.5 cm for an Ir-192 HDR linear source and 3 cm for a Cs-137 LDR spherical source. The short-term stability of the chamber was determined using a cylindrical Cs-137 source positioned in the sweet spot region. The chamber response over a range of 17.4 mCi (644 MBq, Cs-137) and 8.82 Ci (326 GBq, is evaluated. The chamber may be used for calibrating the activities of both HDR Ir-192 and LDR brachytherapy sources.