Journal Article

DKFZ-2017-00656

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Absorbed dose in ion beams: comparison of ionisation- and fluence-based measurements.

Osinga-Blättermann, J.-M. (First author)DKFZ* ; Brons, S. ; Bartz, J. A. ; Akselrod, M. S. ; Jäkel, O.DKFZ* ; Greilich, K.-S. (Last author)DKFZ*

2014
Oxford Univ. Press Ashford

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Please use a persistent id in citations: doi:10.1093/rpd/ncu004

Abstract: A direct comparison measurement of fluorescent nuclear track detectors (FNTDs) and a thimble ionisation chamber is presented. Irradiations were performed using monoenergetic protons (142.66 MeV, ϕ=3×10(6) cm(-2)) and carbon ions (270.55 MeV u(-1), ϕ=3 × 10(6) cm(-2)). It was found that absorbed dose to water values as determined by fluence measurements using FNTDs are, in case of protons, in good agreement (2.4 %) with ionisation chamber measurements, if slower protons and Helium secondaries were accounted for by an effective stopping power. For carbon, however, a significant discrepancy of 4.5 % was seen, which could not be explained by fragmentation, uncertainties or experimental design. The results rather suggest a W-value of 32.10 eV ± 2.6 %. Additionally, the abundance of secondary protons expected from Monte-Carlo transport simulation was not observed.

Keyword(s): Ions ; Protons ; Water ; Helium ; Carbon

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Contributing Institute(s):

1. Medizinische Physik in der Strahlentherapie (E040)

Research Program(s):

1. 315 - Imaging and radiooncology (POF3-315) (POF3-315)

Appears in the scientific report 2014

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Database coverage:
; Allianz-Lizenz / DFG ; Current Contents - Agriculture, Biology and Environmental Sciences ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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