Determination of percentage depth dose for 6 and 10 MV x-rays using Ge-doped optical fibre and TLD-100
Percentage depth doses for 6 and 10 MV x-ray beams from a linear accelerator were measured using ~1 cm long (~0.3 mg) Ge-doped optical fibre as a thermoluminescence dosimeter for two field sizes, 5 × 5 and 10 × 10 cm2. The results indicate that the Ge-doped optical fibre dosimeter is in good agreeme...
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| 格式: | Article |
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Institute of Physics
2002
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| 在線閱讀: | http://eprints.um.edu.my/12149/ http://iopscience.iop.org/0952-4746/22/4/306;jsessionid=787864F5460A9A504B7FC5CB25F80C0B.c2 http://dx.doi.org/10.1088/0952-4746/22/4/306 |
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| 總結: | Percentage depth doses for 6 and 10 MV x-ray beams from a linear accelerator were measured using ~1 cm long (~0.3 mg) Ge-doped optical fibre as a thermoluminescence dosimeter for two field sizes, 5 × 5 and 10 × 10 cm2. The results indicate that the Ge-doped optical fibre dosimeter is in good agreement with the results from a PTW 30001 cylindrical ionisation chamber and TLD-100. For 6 MV x-ray beams we observe that the depth of maximum dose dmax is 1.5 and 2 cm for field sizes of 5 × 5 and 10 × 10 cm2 respectively. For 10 MV dmax is 2 cm for a field size of 5 × 5 cm2 and 2.5 cm for a 10 × 10 cm2 field. |
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