6533b7d1fe1ef96bd125d61b
RESEARCH PRODUCT
Dosimetry in mixed gamma–neutron radiation fields and energy compensation filters for CaF2:Tm TL detectors
G. HampelF. BeckerA. Lizon AguilarB. BurgkhardtB. WortmannR. BöttgerS. Nagelssubject
RadiationChemistrybusiness.industryAstrophysics::High Energy Astrophysical PhenomenaPhysics::Medical PhysicsRadiochemistryGamma rayNeutron radiationThermoluminescenceNeutron temperatureNeutron captureOpticsDosimetryNeutronThermoluminescent dosimeterbusinessInstrumentationdescription
Abstract Strong fields of thermal and epithermal neutrons as used for Boron Neutron Capture Therapy (BNCT) show a relatively small gamma dose. However, for accurate dose estimation, both the neutron as well as the gamma component has to be considered. Different approaches have been studied with various thermoluminescence detectors (TLDs). As a result, CaF2:Tm detectors (TLD-300) are attributed to be most insensitive to thermal neutrons but not tissue-equivalent. In this paper we focus on the measurement of the gamma dose with TLD-300 in mixed irradiation fields. To overcome the disadvantage of being not tissue-equivalent, a study on energy compensation filters was performed. The paper comprises also calibrations of TLD-300 using energy compensation filters at the PTB-reference field for thermal neutrons, and first test experiments at the TRIGA Mainz including simulations.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-02-01 | Radiation Measurements |