Comparisons of LET distributions for protons with energies between 50 and 200 MeV determined using a spherical Tissue-Equivalent Proportional Counter (TEPC) and a position-sensitive silicon spectrometer (RRMD-III)

T. B. Borak, T. Doke, T. Fuse, S. Guetersloh, L. Heilbronn, K. Hara, M. Moyers, S. Suzuki, P. Taddei, K. Terasawa, C. J. Zeitlin

研究成果: Article査読

30 被引用数 (Scopus)

抄録

Experiments have been performed to measure the response of a spherical tissue-equivalent proportional counter (TEPC) and a silicon-based LET spectrometer (RRMD-III) to protons with energies ranging from 50-200 MeV. This represents a large portion of the energy distribution for trapped protons encountered by astronauts in low-Earth orbit. The beam energies were obtained using plastic polycarbonate degraders with a monoenergetic beam that was extracted from a proton synchrotron. The LET spectrometer provided excellent agreement with the expected LET distribution emerging from the energy degraders. The TEPC cannot measure the LET distribution directly. However, the frequency mean value of lineal energy, ȳf, provided a good approximation to LET. This is in contrast to previous results for high-energy heavy ions where ȳf underestimated LET, whereas the dose-averaged lineal energy, ȳD, provided a good approximation to LET.

本文言語English
ページ(範囲)687-692
ページ数6
ジャーナルRadiation Research
162
6
DOI
出版ステータスPublished - 2004 12月 1
外部発表はい

ASJC Scopus subject areas

  • 生物理学
  • 放射線
  • 放射線学、核医学およびイメージング

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