Spectromicroscopic film dosimetry for high-energy microbeam from synchrotron radiation

A microscope with band-pass filters was used to measure the optical-density distribution of GafChromic films irradiated with multi-slit microbeam X-rays. The planar width was 25 μm, and the center-to-center distance was 200 μm. The peak and valley dose rates in air were found to be 120 and 0.7 Gy/s,...

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Bibliographic Details
Published in:	Applied radiation and isotopes Vol. 67; no. 1; pp. 155 - 159
Main Authors:	Nariyama, Nobuteru, Ohigashi, Takuji, Umetani, Keiji, Shinohara, Kunio, Tanaka, Hiroki, Maruhashi, Akira, Kashino, Genro, Kurihara, Ai, Kondob, Takeshi, Fukumoto, Manabu, Ono, Koji
Format:	Journal Article
Language:	English
Published:	England Elsevier Ltd 2009
Subjects:	Dose Film Dosimetry - methods GafChromic film Microbeam Microscopy - methods PENELOPE Synchrotron radiation Synchrotrons PENELOPE GafChromic film Dose Synchrotron radiation Microbeam
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Summary:	A microscope with band-pass filters was used to measure the optical-density distribution of GafChromic films irradiated with multi-slit microbeam X-rays. The planar width was 25 μm, and the center-to-center distance was 200 μm. The peak and valley dose rates in air were found to be 120 and 0.7 Gy/s, respectively. In a polymethylmethacrylate phantom, the peak-to-valley dose ratio decreased to 80 at a 1-mm depth. Doses calculated with the PENELOPE code agreed with those around the peak but became smaller in the valley.
ISSN:	0969-8043 1872-9800
DOI:	10.1016/j.apradiso.2008.08.002