Determination of the beam quality correction factor $k_{Q,Q_0 } $ for the mic

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• 作者：Sang Hyoun Choi (1)
  Chan Hyeong Kim (1)
  Hyun Do Huh (2)
  Kum-Bae Kim (3)
  SeongHoon Kim (4)
  
• 关键词：Beam quality correction factor ; MicroLion chamber ; Monte Carlo simulation
• 刊名：Journal of the Korean Physical Society
• 出版年：2013
• 出版时间：January 2013
• 年：2013
• 卷：62
• 期：1
• 页码：152-158
• 全文大小：246KB
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• 作者单位：Sang Hyoun Choi (1)
  Chan Hyeong Kim (1)
  Hyun Do Huh (2)
  Kum-Bae Kim (3)
  SeongHoon Kim (4)
  
  1. Department of Nuclear Engineering, Hanyang University, Seoul, 133-791, Korea
  2. Department of Radiation Oncology, Inha University Hospital, Incheon, 400-711, Korea
  3. Department of Radiation Oncology, Korea Institute of Radiological and Medical Sciences, Seoul, 139-706, Korea
  4. Department of Radiation Oncology, Hanyang University Hospital, Seoul, 135-791, Korea
  
• ISSN：1976-8524

文摘

The mcroLion chamber, which has a small volume (0.0017cc) and a high sensitivity suitable for small field dosimetry, is an ionization chamber with liquid (isooctane) filling the cavity volume. In the present work, we used two alternative ways to estimate the beam quality correction factor $k_{Q,Q_0 }^{micL} $ of the microLion chamber in the 6 MV photon beam from a Clinac iX accelerator (Varian, USA); Monte Carlo simulations and experimental methods. The Monte Carlo calculation (1.0183 ± 0.58%) agreed to within 0.56% with the experimental determination (1.024 ± 0.58%). The results from the two methods were in good agreement within acceptable uncertainties. We think that the averaged factor, 1.0212, could be used for the microLion chamber in reference dosimetry.