Thermoluminescent dosimeters for high-dose applications
| Autor: | Attix Fh, Kerris K, Gorbics Sg |
|---|---|
| Rok vydání: | 1973 |
| Předmět: |
Reproducibility
Manganese Dosimeter Materials science Radiation Epidemiology Health Toxicology and Mutagenesis Radiochemistry Bremsstrahlung Phosphor Lithium Thermoluminescence Calcium Fluoride Fluorides Evaluation Studies as Topic Thermoluminescent Dosimetry Borates Dosimetry Radiology Nuclear Medicine and imaging Atomic number Cobalt Radioisotopes |
| Zdroj: | Health physics. 25(5) |
| ISSN: | 0017-9078 |
| Popis: | CaF2: Mn, LiF(TLD-700), and Li2B4O7: Mn in the forms of powders, chips and Teflon discs have been investigated for possible application in dosimetry at a bremsstrahlung generator delivering exposures up to 4 × 104 R in pulses of approximetly 10−7 sec duration. The 60Co response per roentgen was investigated over the range 103-106 R. Some degree of supralinearity was found in CaF2: Mn, hitherto unreported. Sample-to-sample reproducibility at 103 R was compared for the different forms of dosimeter. The dose rate dependence was investigated, qualitatively verifying Goldstein's finding that LiF(TLD-700) exhibits dose-rate saturation above approximatly 104 rad (in silicon) delivered in approximatly 10−7 sec. Considering handling convenience, low cost for single throw-away use, relatively small divergence from linearity, lack of dose-rate dependence, good reproducibility of response from unit to unit without individual calibration, and similarity of atomic number between the TL phosphor and the desired dose-reference material (Si), the 0.4 mm-thick 5 %-loaded CaF2: Mn-Teflon disc was found to be the dosimeter of choice for this application. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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