A method was investigated to measure gamma and fast neutron doses in phantoms exposed to an epithermal neutron beam designed for neutron capture therapy (NCT). The gamma dose component was measured by TLD-300 [CaF2:Tm] and the fast neutron dose, mainly due to elastic scattering with hydrogen nuclei, was measured by alanine dosemeters [CH3CH(NH2)COOH]. The gamma and fast neutron doses deposited in alanine dosemeters are very near to those released in tissue, because of the alanine tissue equivalence. Couples of TLD-300 and alanine dosemeters were irradiated in phantoms positioned in the epithermal column of the Tapiro reactor (ENEA-Casaccia RC). The dosemeter response depends on the linear energy transfer (LET) of radiation, hence the precision and reliability of the fast neutron dose values obtained with the proposed method have been investigated. Results showed that the combination of alanine and TLD detectors is a promising method to separate gamma dose and fast neutron dose in NCT.
|Titolo:||Alanine and TLD coupled detectors for fast neutron dose measurements in neutron capture therapy (NCT)|
|Autori interni:||GAMBARINI, GRAZIA LAVINIA CARLA|
|Parole Chiave:||biological effects of gamma-rays; biological effects of neutrons; biological tissues; dosimetry; fission reactor monitoring; gamma-ray detection; neutron capture therapy; neutron detection; phantoms; thermoluminescent dosimeters|
|Settore Scientifico Disciplinare:||Settore FIS/01 - Fisica Sperimentale|
|Data di pubblicazione:||2004|
|Digital Object Identifier (DOI):||10.1093/rpd/nch108|
|Appare nelle tipologie:||01 - Articolo su periodico|