| LU Ji-long,CHENG Jin-sheng,GUO Zhao-hui,et al.IAEA/SSDL intercomparison of calibration factors for therapy level ionization chambers[J].Chinese Journal of Radiological Medicine and Protection,2005,25(4):368-369 |
| IAEA/SSDL intercomparison of calibration factors for therapy level ionization chambers |
| Received:January 31, 2005 |
| DOI： |
| KeyWords:Air kerma Absorbed dose to water Ionization chamber Intercomparison |
| FundProject: |
| Author Name | Affiliation | | LU Ji-long | National Institute for Radiological Protection, China CDC, Beijing 100088, China | | CHENG Jin-sheng | National Institute for Radiological Protection, China CDC, Beijing 100088, China | | GUO Zhao-hui | National Institute for Radiological Protection, China CDC, Beijing 100088, China | | 李开宝 | National Institute for Radiological Protection, China CDC, Beijing 100088, China |
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| Abstract:: |
| Objective By participating in IAEA_SSDL intercomparison,a dose to water calibration factor was introduced in order to check the measuring accuracy of 60Co radiotherapy dose level standard and ensure the reliability and consistency of our calibration. Methods We carried out both air kerma and absorbed dose to water calibrations against 60Coγ-rays for one of our field class ionization chambers,and sent the results together with the chamber to IAEA dosimetry laboratory for calibration, then IAEA calibrated it and gave the deviation of the intercomparison. Results The deviation of our air kerma calibration factors is -0.5%,and the deviation of our absorbed dose to water calibration factors is 0.4%. Conclusion The deviation of calibration factors between IAEA and SSDL should be no more than ±1.5%.Therefore, the result of this intercomparison is considered satisfactory. |
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