The Response of a Spherical Tissue-Equivalent Proportional Counter to Different Ions Having Similar Linear Energy Transfer

Stephen B. Guetersloh, Thomas B. Borak, Phillip J. Taddei, Cary Zeitlin, Lawrence Heilbronn, Jack Miller, Takeshi Murakami, Yoshiyuki Iwata

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

The response of a tissue-equivalent proportional counter (TEPC) to different ions having a similar linear energy transfer (LET) has been studied. Three ions, 14N, 20Ne and 28Si, were investigated using the HIMAC accelerator at the National Institute of Radiological Sciences at Chiba, Japan. The calculated linear energy transfer (LET) of all ions was 44 ± 2 keV/μm at the sensitive volume of the TEPC. A particle spectrometer was used to record the charge and position of each incident beam particle. This enabled reconstruction of the location of the track as it passed though the TEPC and ensured that the particle survived without fragmentation. The spectrum of energy deposition events in the TEPC could be evaluated as a function of trajectory through the TEPC. The data indicated that there are many events from particles that did not pass through the sensitive volume. The fraction of these events increased as the energy of the particle increased due to changes in the maximum energy of the δ rays. Even though the LET of the incident particles was nearly identical, the frequency-averaged lineal energy, ȳF, as well as the dose-averaged lineal energy, ȳD, varied with the velocity of the incident particle. However, both values were within 15% of LET in all cases.

Original languageEnglish (US)
Pages (from-to)64-71
Number of pages8
JournalRadiation research
Volume161
Issue number1
DOIs
StatePublished - Jan 1 2004

ASJC Scopus subject areas

  • Biophysics
  • Radiation
  • Radiology Nuclear Medicine and imaging

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    Guetersloh, S. B., Borak, T. B., Taddei, P. J., Zeitlin, C., Heilbronn, L., Miller, J., Murakami, T., & Iwata, Y. (2004). The Response of a Spherical Tissue-Equivalent Proportional Counter to Different Ions Having Similar Linear Energy Transfer. Radiation research, 161(1), 64-71. https://doi.org/10.1667/RR3101