رمضانی مقدم آرانی, احمد
دانشگاه کاشان
[ 1 ] - اندازه‌گیری مقدار سلنیوم موجود در گندم نواحی مختلف شهر کاشان به روش فعالسازی نوترونی در رآکتور مینیاتوری اصفهان
In this work investigated the determination of Selenium in wheat of Kashan's people's meal, via neutron activation analysis method (NNA) in “The Miniature Neutron Source Reactor” section. The γ transition produced in reaction of the neutron capture 77Se (n, γ) (T1/2= 17.4 s) was used to determine the concentration of Selenium, due to the rapid transfer of samples from th...
[ 2 ] - امکان سنجی بکارگیری عناصر نیمه هادی از نوع PIN به منظور دزیمتری پرتوهای ایکس تشخیصی
Knowing patient exact dose during radiological activities is considered as one of the main principles to decrease radiation-induced dangers which are not really necessary and affect a great deal of people. In this respect, in recent years many extensive studies have been done on types of photodiodes and production of X-ray detectors using semiconductor elements. Since these elements are not ver...
[ 3 ] - امکان‌سنجی به‌کارگیری روش گاما دنسیتومتری در اندازه‌گیری ضریب کسر حفرۀ جریان دوفازی در کانالی با مقطع مربعی
Precise measurement of void coefficient in two phase flow is one of important parameters in thermal hydraulic parameters such as average density, two phase flow pressure drop and two phase flow pattern. In this study the void coefficient has been correlated experimentally based on attenuation coefficient gamma ray emitted form 137Cs source passing a rectangular channel. The average void fractio...
[ 4 ] - بررسی رفتار الکترونیکی یک مدار دیودی در معرض تابش برای آشکارسازی پرتوهای گاما
The ionizing radiations are able to make either a permanent or temporarily damage in the electronic circuits. The temporary effects during irradiation can be used to detect the ionizing radiation. In this study a diode in reverse bias has been used to investigate the effects of ionization radiation on semiconductors. The variation of reverse current of diode has been monitored due to interactio...
[ 5 ] - اندازه‌گیری قطبش باریکه دوترون قبل و بعد از شتاب گرفتن
Beam polarization measurement in scattering experiments with a high accuracy and the lowest possible cost is an important issue. In this regard, deuteron beam polarization was measured in the low-energy beam line easily with a relatively low cost procedure and in a very short time by Lamb Shift Polarimeter (LSP). Also, the beam polarization has been measured in high-energy beam line with BINA. ...
[ 6 ] - اندازه‌گیری مشاهده‌پذیرهای کانال تجزیه سه‌جسمی برای بخشی از فضای فاز پراکندگی دوترون- دوترون در انرژی برنوکلئون
Information obtained from nucleus as a bound system of nucleons and from nucleon-nucleon scattering experiments is a strong tool for studying various aspects of nuclear forces. Deuteron-deuteron scattering as a four-nucleon system can provide useful information. So, scattering experiment of a polarized beam of deuteron with kinetic energy of65 MeV/nucleon from a liquid-deuterium target was done...
[ 7 ] - بررسی پارامترهای سینتیک دام‌های عمیق دزیمتر C:3O2α-Al (500-TLD) از راه مقایسه‌ی پاسخ گرمالیانی انتقال یافتهی نوری تجربی با مدل نظری
پاسخ گرمالیانی انتقال یافتهی نوری (PTTL) دزیمترC:3O2α-Al (500-TLD) با مدل نظری توصیفکنندهی این پ...
[ 8 ] - Measuring the photon and thermal neutron dose values of contralateral breast surface undergone breast cancer radiation therapy
This research aimed to measure the received photon and thermal neutron doses to contralateral breast (CB) surface in breast cancer radiation therapy for different field sizes in presence of dynamic and physical wedges. The photon and thermal neutron doses were measured by thermo uminescent dosimeter (TLDs) chips for 11 × 13, 11 × 17 and 11 × 21 cm2 field sizes in presence of physical and dynamic ...
[ 9 ] - Preparation and characterization of Epoxy/Lead oxide nano-composite for shield against gamma and X-rays
Polymer nano-composites are a group of materials that represent proper mechanical, chemical, thermal and optical properties due to the presence of certain percentages of a filler in a polymeric matrix. In this study lead oxide nanoparticles were prepared by direct precipitation method. Then the lead oxide-epoxy resin nanocomposite was prepared by mixing (without solvent) with different weight p...
[ 10 ] - Preparation of nanocomposite scintillator of ZnS doped with Ag, Cu and AgCu for alpha particle detection
ZnS nanoparticles (NPs) doped with Ag, Cu, and AgCu were synthesized using hydrothermal method in water solution. The NPS are characterized by X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy scanning (EDX), scanning electron microscopy (SEM) and dynamic light scattering (DLS). The produced NPs have approximately hexagonal structure and a cubic zinc blended struc...
[ 11 ] - The effect of Melatonin pretreatment on growth responses and enhancement of the enzyme's antioxidant system in Chlorella vulgaris under stress of ionizing radiation
Melatonin has important roles in many growth and stress-related responsive processes in plants and algae. In this study, the mediating role of 100 and 500 µM melatonin on photosynthetic pigments and non-enzymatic antioxidant responses of microalga, Chlorella vulgaris to gamma irradiation stress has been studied. The result showed that the alga treated with 100 µM had a stable amount of chloroph...
[ 12 ] - Gamma Irradiation Effect on Asymmetric Giant Magnetoimpedance of Co68.15Fe4.35Si12.5B15 Amorphous Alloy
The giant magneto impedance (GMI) effect is a large variation in the electrical impedance of a magnetic conductor when subjected to a static magnetic field. The sensitivity to the direction (AGMI) and magnitude of applied magnetic field and also linearity levels of this effect are three important parameters in magnetic sensors application. A suitable annealing procedure can be used to ac...
[ 13 ] - The effect of Melatonin pretreatment on growth responses and enhancement of the enzymatic antioxidant system in Chlorella vulgaris under stress of ionizing radiation
Melatonin as a compound made by photosynthetic organizers protects them against many environmental stresses. Modulating mechanisms of melatonin, as a protector are not well known in early eukaryotes, such as algae. In this research, the effect of melatonin pre-treatment on evaluating Chlorella vulgaris resistance to gamma ionizing radiation was investigated. The results showed that 100 µM conce...
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