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EFFICIENCY-CORRECTED DOSE VERIFICATION WITH THERMOLUMINESCENCE DOSEMETERS IN HEAVY-ION BEAMS

Berger, Thomas and Hajek, M. and Fugger, M. and Vana, N. (2006) EFFICIENCY-CORRECTED DOSE VERIFICATION WITH THERMOLUMINESCENCE DOSEMETERS IN HEAVY-ION BEAMS. Radiation Protection Dosimetry, 120 (1-4), pp. 361-364. Oxford University Press.

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Abstract

One of the most essential difficulties in heavy-ion dosimetry by means of thermoluminescence dosemeters (TLDs)—often seen as a serious disadvantage of TLD utilisation—regards the changing TL-efficiency with increasing linear energy transfer (LET) of the particle. This behaviour leads to a falsification of absorbed dose that can be significant for many applications, e.g. in space or radiotherapeutic dosimetry. The high-temperature TL emission of LiF:Mg,Ti TL detectors can be exploited to obtain information about the LET of the heavy-ion radiation field under study. The high-temperature ratio (HTR) is used as a parameter to determine average LET. To correct the absorbed dose according to the TL-efficiency, the detailed dependence of HTR- and TL-efficiency on LET was recorded. These investigations were accomplished at the Heavy Ion Medical Accelerator (HIMAC) in Chiba, Japan, with a variety of high-energy ion beams (helium, carbon, neon, silicon and iron) ranging in LET from 2.2 to 393 keV µm<sup>-1</sup>. The obtained relationships HTR vs. LET and TL-efficiency vs. LET were combined into a TL efficieny vs. HTR relationship. This enables correction of the absorbed dose (HTR-B method). The methodology is demonstrated by means of TLD 700 (<sup>7</sup>LiF:Mg,Ti) measurements in carbon beams of 290 and 400 MeV n<sup>-1</sup> available from HIMAC.

Item URL in elib:https://elib.dlr.de/47241/
Document Type:Article
Title:EFFICIENCY-CORRECTED DOSE VERIFICATION WITH THERMOLUMINESCENCE DOSEMETERS IN HEAVY-ION BEAMS
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Berger, ThomasUNSPECIFIEDUNSPECIFIED
Hajek, M.Atomic Institute of the Austrian Universities (ATI), Stadionallee 2, 1020 Vienna, AustriaUNSPECIFIED
Fugger, M.Atomic Institute of the Austrian Universities (ATI), Stadionallee 2, 1020 Vienna, AustriaUNSPECIFIED
Vana, N.Atomic Institute of the Austrian Universities (ATI), Stadionallee 2, 1020 Vienna, AustriaUNSPECIFIED
Date:18 May 2006
Journal or Publication Title:Radiation Protection Dosimetry
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:120
Page Range:pp. 361-364
Publisher:Oxford University Press
Status:Published
Keywords:Dosimetry, THERMOLUMINESCENCE DOSEMETER, HEAVY-ION, LET
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - Vorhaben Strahlenbiologie (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kopp, Kerstin
Deposited On:28 Feb 2007
Last Modified:27 Apr 2009 13:30

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