نتایج جستجو برای: thermoluminescence dosimetry

تعداد نتایج: 8971  

2013
M. Benabdesselam F. Mady S. Girard

This study analyses the thermally stimulated luminescence (TSL) or thermoluminescence glow curve between 300 and 773 K of germanium-doped silica optical fibre and finds a main glow peak at around 500 K with a characteristic spectral emission centred at 400 nm. Both features are particularly suitable for dosimetry. Thus, an investigation by the TSL technique of some first clinically relevant fea...

Journal: :Silicon 2021

The thermoluminescence technique was employed to study bioglass matrix prepared using the traditional of glass making. synthesized were investigated X-ray diffraction (XRD), and differential thermal analysis (DTA) has been studied. highest thermoluminescent intensity found for composition 26.91 % CaO, 45.68 SiO2, 2.50 P2O5, 25.094 %Na2O (mol%), with only one glow peak at 460 k. TL response illu...

احسان صادقی, , مصطفی زاهدی فر, ,

Calcium fluoride nanoparticles doped with thulium and cerium were synthesized as a novel nanostructure by using the hydrothermal method. The prepared samples were characterized by X-ray diffraction (XRD) and energy dispersive spectrometer (EDS). The crystallite size of about 36 nm was estimated employing Scherer’s formula. Its shape and size were also observed by scanning electron microscope (...

Journal: :iranian journal of radiation research 0
h.r. baghani radiation medicine department, nuclear engineering faculty, shahid beheshti university, tehran, iran s.m.r. aghamiri radiation medicine department, nuclear engineering faculty, shahid beheshti university, tehran, iran h. gharaati radiotherapy physics department, cancer institute of tehran, tehran, iran s.r. mahdavi medical physics department, medical faculty, iran university of medical science, tehran, iran s.m. hosseini daghigh radiation medicine department, nuclear engineering faculty, shahid beheshti university, tehran, iran

background: craniospinal radiotherapy faces technical challenges which are due to the sensitivity of the location in which the gross tumor is, and to organs at risk around planning target volume. using modern treatment planning systems causes a reduction in the complexities of the treatment techniques. the most effective method to assess the dosimetric accuracy and the validity of the software ...

Journal: :Radiation Measurements 2022

The quest for new materials thermoluminescence (TL) and optically stimulated luminescence (OSL) dosimetry continues to be a central line of research in dosimetry, occupying many groups investigators, is the topic publications. Nevertheless, it has also been area with pitfalls, slow advances our understanding processes, rare improvements over existing materials. Therefore, this paper reviews sta...

2014
Parvin Mohammadyari Mehdi Zehtabian Sedigheh Sina Ali Reza Tavasoli Reza Faghihi

Currently, the use of blood irradiation for inactivating pathogenic microbes in infected blood products and preventing graft-versus-host disease (GVHD) in immune suppressed patients is greater than ever before. In these systems, dose distribution and uniformity are two important concepts that should be checked. In this study, dosimetry of the gamma chamber blood irradiator model Gammacell 3000 ...

2012
Juan Azorín Nieto Juan Azorin Nieto

Radiation dosimetry is fundamental in Medical Physics, involving patients and phantom dosimetry. In both cases thennoluminescence dosimetry (TLD) is the most appropriate technique for measuring the absorbed dose. In this paper thennoluminescence phenomenon as well as the use of TLD in radiodiagnosis and radiotherapy for in vivo or in phantom measurements is discussed. Some results of measuremen...

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