ThuliumV1, Main, Exploration, bibRecord, 000F49

Dose response of CaF2:Tm to charged particles of different LET.

Identifieur interne : 000F49 ( Main/Exploration ); précédent : 000F48; suivant : 000F50

Dose response of CaF2:Tm to charged particles of different LET.

Auteurs : M F Moyers [États-Unis] ; G A Nelson

Source :

Medical physics [ 0094-2405 ] ; 2009.

RBID : pubmed:19746804

Descripteurs français

KwdFr :
- Dose de radiation, Eau, Fantômes en imagerie, Fluorure de calcium (), Humains, Relation dose-effet des radiations, Thulium (), Transfert linéique d'énergie.
MESH :
- Dose de radiation, Eau, Fantômes en imagerie, Fluorure de calcium, Humains, Relation dose-effet des radiations, Thulium, Transfert linéique d'énergie.

English descriptors

KwdEn :
- Calcium Fluoride (chemistry), Dose-Response Relationship, Radiation, Humans, Linear Energy Transfer, Phantoms, Imaging, Radiation Dosage, Thulium (chemistry), Water.
MESH :
- chemical , chemistry : Calcium Fluoride, Thulium.
- Dose-Response Relationship, Radiation, Humans, Linear Energy Transfer, Phantoms, Imaging, Radiation Dosage, Water.

Abstract

Thermoluminescent dosimeters are well established for performing calibrations in radiotherapy and for monitoring dose to personnel exposed to low linear energy transfer (LET) ionizing radiation. Patients undergoing light ion therapy and astronauts engaged in space flight are, however, exposed to radiation fields consisting of a mix of low- and high-LET charged particles. In this study, glow curves from CaF2:Tm chips were examined after exposure to various electron and ion beams. The annealing and readout procedures for these chips were optimized for these beams. After a 10 min prereadout annealing at 100 degrees C, the optimized glow curve samples the light output between 95 and 335 degrees C with a heating rate of 2 degrees C/s. The ratio of the integral of the glow curve under peaks 4-6 to the integral under peak 3 was approximately 0.9 for electrons, 1.0 for entrance protons, 1.6 for peak protons, and 2.2 for entrance carbon, silicon, and iron ions. The integral light output per unit dose in water for the iron exposures was about half as much as for the electron exposures. The peak-area-ratio can be used to determine a dose response factor for different LET radiations.

DOI: 10.1118/1.3159758
PubMed: 19746804

Affiliations:

États-Unis

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<term>Relation dose-effet des radiations</term>
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<term>Eau</term>
<term>Fantômes en imagerie</term>
<term>Fluorure de calcium</term>
<term>Humains</term>
<term>Relation dose-effet des radiations</term>
<term>Thulium</term>
<term>Transfert linéique d'énergie</term>
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<front><div type="abstract" xml:lang="en">Thermoluminescent dosimeters are well established for performing calibrations in radiotherapy and for monitoring dose to personnel exposed to low linear energy transfer (LET) ionizing radiation. Patients undergoing light ion therapy and astronauts engaged in space flight are, however, exposed to radiation fields consisting of a mix of low- and high-LET charged particles. In this study, glow curves from CaF2:Tm chips were examined after exposure to various electron and ion beams. The annealing and readout procedures for these chips were optimized for these beams. After a 10 min prereadout annealing at 100 degrees C, the optimized glow curve samples the light output between 95 and 335 degrees C with a heating rate of 2 degrees C/s. The ratio of the integral of the glow curve under peaks 4-6 to the integral under peak 3 was approximately 0.9 for electrons, 1.0 for entrance protons, 1.6 for peak protons, and 2.2 for entrance carbon, silicon, and iron ions. The integral light output per unit dose in water for the iron exposures was about half as much as for the electron exposures. The peak-area-ratio can be used to determine a dose response factor for different LET radiations.</div>
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Dose response of CaF2:Tm to charged particles of different LET.

Dose response of CaF2:Tm to charged particles of different LET.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki

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