نتایج جستجو برای: thermoluminescence dosimetry
تعداد نتایج: 8971 فیلتر نتایج به سال:
This phantom study was designed to compare the radiation dose in thoracic and abdomen-pelvic CT scans with and without use of tube current modulation (TCM). Effective dose (ED) and size-specific dose estimation (SSDE) were calculated with the absorbed doses measured at selective radiosensitive organs using a thermoluminescence dosimeter-100 (TLD-100). When compared to protocols without TCM, the...
The current focus on networking and mutual assistance in the management of radiation accidents or incidents has demonstrated the importance of a joined-up approach in physical and biological dosimetry. To this end, the European Radiation Dosimetry Working Group 10 on 'Retrospective Dosimetry' has been set up by individuals from a wide range of disciplines across Europe. Here, established and em...
Absorbed dose rate measurements of a 50 kV(p) handheld X-ray probe source in a water phantom are described. The X-ray generator is capable of currents of up to 40 microA, and is designed for cranial brachytherapy and intraoperative applications with applicators. The measurements were performed in a computer-controlled water phantom in which both the source and the detectors are mounted. Two dif...
Abstract AlN is a wide band gap material with promising properties for dosimetric applications, especially in UV dosimetry. In the present research, thermoluminescence method used order to better understand sunlight and X-ray irradiation effects on yttria doped ceramics. general, TL response characterised by broad peak maxima around 400–450 K emission spectrum (400 nm), Blue (480 nm) Red (600 b...
*長友恒 人 ,市 川米太:奈 良教育大学物理教室,奈 良 市高畑町 〒630 **星 正治:広 島大学原爆放射能医学研究所,広 島市 南区霞1-2-3 〒734 Thermoluminescence dosimetry/Gamma rays/Hiroshima and Nagasaki/Atomic bomb This study reports gamma-ray doses measured using thermoluminescence (TL)dosimetry of atomic-bomb exposed ceramic samples from Hiroshima and Nagasaki. Advances in the dosimetry of TL-sensitive minerals in the field of TL dating of archaeolo...
For the first time, samples of magnesium oxide ceramics were obtained by a method based on irradiation powders with beam fast electrons. Luminescence centers associated intrinsic and impurity defects found in samples. A comparative analysis thermoluminescence (TL) curves dose dependencies TL MgO radiation thermochemical methods is carried out. The linear dependence peak at 370 K excited pulsed ...
Magnesium silicate has been prepared by a precipitation technique. This composite structure was proven different tools, XRD, TGA&DTA, FTIR, and XRF. found to have the formulas Mg1.1SiO3.2.1.1H2O. Thermoluminescence (TL) dosimetric properties like (linearity, fading, energy independence) of magnesium in shape MgSiO3 estimated. A strong TL dosimetry peak associated with gamma radiation arises fro...
a lithium borate thermoluminescence dosimeter with 0.3 wt% of manganese impurityconcentration was prepared for high dose levels in the range of 1-30 kgy for gamma irradiation applications.the tld reader was used for read out purposes from ambient temperature to about 400°c with a heating rate of 6°c/sec. the pre- and post- irradiation anneal temperature was 300°c for 1.5 and 1 hours respectivel...
Gafchromic films are increasingly being used for dosimetry in medical and industrial applications of ionizing radiation because of their favorable characteristics such as self developing in nature, easy to handle, dose rate independent response, insensitivity to normal room lights, high resolution and insensitivity to variation in the environment conditions. The dosimetry measurements using Gaf...
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