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Report No.

Dosimetry for 3-45 MeV/u ion beams using thin film dosimeters

Kojima, Takuji; Sunaga, Hiromi; Takizawa, Haruki; Hanaya, Hiroaki; Tachibana, Hiroyuki*

Thin film dosimeters of about 10-200 mm in thickness, which were well -characterized for $$^{60}$$Co $$gamma$$-rays or 2-MeV electrons, have been applied to dosimetry for ion beams. For development of dosimetry covering the dose range of 0.005 to 200 kGy with high precision within $$pm$$5%, the linear energy transfer (LET) characteristics of thin films were studied involving development of precise fluence measurement. Dose mapping technique was also developed achieving high spatial resolution values of about 1$$mu$$m and $$<$$10$$mu$$m for lateral and depth directions respectively. The outline of the recent development is summarized in this paper.



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