Fading time and irradiation dose estimation from thermoluminescent dosemeters using glow curve deconvolution

Abstract Purpose In order to achieve the goal of rapid response, effective disposal and protection of life of large-scale radiation events, how to establish the uniform standard curve of biological dose estimation for chromosome aberration analysis becomes an urgent need. Methods Chromosomal aberrations with different irradiation dose rates were used to analyze the biological dose curve and the share of the “dicentric + ring” caused by the dose rate at each dose point. The dose-rate effect of 60Co-rays on peripheral blood lymphocytes was analyzed by statistical method . Results Irradiation dose is dominant ; At each dose point, “(dicentric chromosome + centric rings) /cell” is proportional to "dose rate", that is, Y = k X + b;Between 1-5Gy dose, “(dicentric chromosome + centric rings) /Cell ” holds a quadratic linear relationship with dose rate, that is,y = ax2 + bx + c. Conclusion The fraction of “dicentric + ring” caused by dose rate was calculated, if “Dose rate” is Z Gy•min− 1, it corresponds to an increase in linear relationships. Biological dose estimation curve :Y = 3.318 × 10− 3+2.0541 × 10− 2 x + 7.1721 × 10− 2x2(1.16Gy•min− 1༛R2 = 0.9997)(3).Dose rate :Y Dose rate = 1.2534 × 10− 2 x 2+6.6164 × 10− 2 x -2.732 × 10− 3༈0.01Gy•min− 1༛R2 = 0.999༉(1).The estimated dose is formula (3) – (1.16-Z) × formula (1).

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The thermoluminescence of irradiated polyethylene and other polymers

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1963.0012 ◽

1963 ◽

Vol 271 (1345) ◽

pp. 170-187 ◽

Cited By ~ 62

Keyword(s):

Activation Energy ◽

Glow Curve ◽

Irradiation Dose ◽

Visible Region ◽

Ultra Violet ◽

Degree Of Crystallinity ◽

Γ Irradiation ◽

Chemical Impurities ◽

Transition Points ◽

The Degree Of Crystallinity

The thermoluminescence glow curves of various polymers have been observed in the temperature range 77 °K to ice point after 60 Co γ-irradiation, and a number of them are reproduced. A detailed study of polyethylene thermoluminescence was made. The glow curve of this material in the absence of oxygen comprises three glow peaks, the α, β, γ peaks, whose luminescence intensities are proportional to irradiation dose for doses below 50 krads. The α, β, γ peaks all decay exponentially at constant temperature, and a study of the kinetics involved shows that all these peaks have the same activation energy at the lowest temperatures. At higher temperatures the β and γ peaks each show two different transition points, one in the visible region and one in the ultra-violet, which appear to be related to two of the known structural transitions of polyethylene. The glow curves of a variety of different polyethylenes were recorded. By comparison of these it was found that the relative heights of the α, β, γ peaks are dependent on the degree of crystallinity of the materials but that the normal chemical impurities present in commercial polyethylenes have no effect on their glow curves.

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A feasibility study of the post-irradiation dose estimation with SPECT technique for BNCT

Applied Radiation and Isotopes ◽

10.1016/j.apradiso.2009.03.111 ◽

2009 ◽

Vol 67 (7-8) ◽

pp. S218-S221 ◽

Cited By ~ 1

Author(s):

Y. Sakurai ◽

H. Tanaka ◽

M. Suzuki ◽

Y. Kinashi ◽

S. Masunaga ◽

...

Keyword(s):

Feasibility Study ◽

Irradiation Dose ◽

Dose Estimation ◽

Post Irradiation

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Synthesis and Thermoluminescence of a Spinel-Type Oxide Exposed to Beta-Particle Irradiation

MRS Proceedings ◽

10.1557/opl.2015.126 ◽

2015 ◽

Vol 1769 ◽

Author(s):

Francisco Brown ◽

Tomasa C. Hernandez-Perez ◽

Iliana C. Muñoz ◽

Victor E. Alvarez-Montaño ◽

Catalina Cruz-Vazquez ◽

...

Keyword(s):

Glow Curve ◽

Irradiation Dose ◽

Relative Sensitivity ◽

Beta Particle ◽

Spinel Type ◽

X Ray ◽

Beta Particles ◽

Particle Irradiation ◽

Minimum Detectable Dose ◽

First Time

ABSTRACTCurrently, the research team is systematically studying the oxide compounds present in the ternary system In2O3-TiO2-MgO in order to analyze its thermoluminescent (TL) response. The oxide Mg1.5InTi0.5O4 present in this system was synthesized by a solid state reaction at 1350 °C in air. The X-ray powder diffraction pattern showed a spinel-type structure for this compound. In this work, this spinel, as well as its TL properties when exposed to beta particles, are being reported for the first time. The glow curve is simple and wide with a TL maximum located at 203 °C at 21.33 Gy. The peak shows a shift to lower temperatures and it increases its intensity, as the irradiation dose increases. The lineal behavior was observed between 10.66 to 341 Gy, and no saturation signs were observed. The relative sensitivity variation was 2.7% and standard deviation after ten consecutive irradiation - TL readout cycles was 1 %. The minimum detectable dose was 5.65 Gy for this spinel-type oxide [3]. These results suggest the possible application of Mg1.5InTi0.5O4 in dosimetry.

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Component resolved equivalent dose estimation using TL glow curves of travertine samples from Anatolia, Turkey

Geochronometria ◽

10.1515/geochr-2015-0116 ◽

2020 ◽

Vol 0 (0) ◽

Author(s):

Eren Şahiner ◽

George S. Polymeris ◽

M. Zeynel Öztürk ◽

Y. Kağan Kadioğlu ◽

Niyazi Meriç

Keyword(s):

Glow Curve ◽

Good Accuracy ◽

Peak Height ◽

Glow Peak ◽

Equivalent Dose ◽

Dose Estimation ◽

Plateau Region ◽

The Poor ◽

Integrated Intensity ◽

Methodological Aspects

AbstractThis study provides methodological aspects on the equivalent dose estimation for travertine samples, namely heated calcium carbonate, using the TL multiple-aliquot additive-dose approach. Large equivalent doses (EDs), within the range 750–1300 Gy, were calculated using the plateau method based on the NTL glow curve. Moreover, a component resolved TL glow-peak analysis was carried out, using the integrated intensity of the NTL glow peaks for the ED estimation after deconvolution based on the OTOR model. Three different TL peaks were used, termed P4, P5 and P6. The integrated intensity of TL glow peak P4 resulted in age overestimation (15–26%), compared to the age provided using the plateau method. This overestimation could be attributed to the fact that the temperature range of P4 does not coincide with the plateau region of each sample. Milder overestimation (8–14%) was noticed using the integrated intensity of TL glow peak P6, mostly due to the poor deconvolution resolution. Only the integrated intensity of TL glow peak P5 after deconvolution provides ED values compatible with those yielded using the plateau method, with good accuracy. The present study suggests not using the TL intensity (neither in terms of integrated intensity nor of peak height intensity) for ED estimation; instead it is highly recommended to use either the plateau method, or alternatively integrated intensity of TL peak P5 after deconvolution. Unfortunately, using the peak height of TL P5 is not recommended, due to overlapping with P6.

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Radioimmunotherapy of Xenografts of Human Pancreatic Carcinomas - Intravenous and Intratumoral Application of 131l-Labelled Monoclonal Antibodies

Nuklearmedizin ◽

10.1055/s-0038-1624350 ◽

1986 ◽

Vol 25 (06) ◽

pp. 235-238 ◽

Cited By ~ 1

Author(s):

S. Lander ◽

M. Bahlo ◽

R. Montz ◽

R. Klapdor

Keyword(s):

Irradiation Dose ◽

Tumor Regression ◽

Whole Body ◽

Inhibit Tumor Growth ◽

Local Irradiation ◽

Clinical Value ◽

Direct Radiation ◽

Intravenous Injections ◽

Induce Tumor Regression ◽

High Doses

The effects of radioimmunotherapy were tested in xenografts of 2 different human pancreatic carcinomas comparing the intravenous and intratumoral application. On principle, intravenous injections of high doses of 131l-anti- Ca 19-9 or -BW 494/32 may inhibit tumor growth. In view of the low direct radiation dose (360-2100 rad), however, other factors than direct toxic effects have to be discussed, e. g. systemic effects due to the high whole-body irradiation. Intratumoral application, however, may induce tumor regression or growth inhibition due to the high local irradiation dose. Consequently, this treatment modality might be of clinical value at least in some patients.

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