sedigheh kashian
Radiation Applications Research School, Nuclear Science and Technology Research Institute, Tehran, Iran.
[ 1 ] - Estimation of Natural Radioactivity and Radiation Exposure in Environmental Soil Samples of Golestan, Iran
Introduction: Considering the risk of radiation, the measurement of the natural radiation sources seems to be necessary. In this study, the concentrations of the natural radionuclides, namely 226Ra, 232Th, and 40K, were measured in the soil samples taken from different locations of Golestan, Iran. The measurement results can also be used as a baseline to evaluate the impact of non-nuclear activ...
[ 2 ] - Instrumental Neutron Activation Analysis of Trace Elements in Some Food Spices Consumed In Tehran, Iran
Introduction There is a growing interest in determining the concentration of various elements in food spices. In the present study, the instrumental neutron activation analysis (INAA) was employed to measure the trace elements in 11 commonly food spices consumed in Tehran, Iran. Materials and Methods The levels of K, Mn, Na, Cl, V, Br, Al, and As were determined and their effects on human healt...
[ 3 ] - محاسبه نسبت دز جذبی بافت های مختلف به آب برای شتابدهنده های درمانی الکتا 25 مگاولتی و زیمنس 6 مگاولتی
In this paper, the ratio of adsorbed dose to the tissues of muscle, blood and bone to water for medical accelerators of Electa 25MV and Siemens 6MV is calculated using an analytical method based on cavity theory and Monte Carlo simulation. To confirm the validation of these methods, the ratio of absorbed dose to air to water was determined experimentally for radiation field of 60Co in Secondary...
[ 4 ] - Producing 65Zn and 60Co gamma sources for energy and efficiency calibration of gamma spectrometry systems
Precise calibration of energy and efficiency of gamma spectrometry systems for different geometries is very important. In most cases, preparation of these sources for educational and research centers is very difficult due to high costs and lack of access to the reactor. The purpose of this paper is to explain the procedure for production of calibration sources 65Zn and 60Co using instrumental ...
[ 5 ] - Concentration Measurement of 12 Elements in Five Herbal Plants Using Neutron Activation Analysis Approach
Introduction: Nowadays, many people use medicinal plants to manage diseases; therefore, detailed knowledge of the type and level of elements present in these plants is of prominent importance.The present study aimed to determine the weight fraction of 12 elements in the five most common medicinal plants in Iran. The names of these plants are caraway (Carum carvi), savo...
[ 6 ] - Calculation of absorbed dose in lung tissue equivalent and compared it with prediction of a treatment planning system using Collapsed Cone Convolution algorithm
External radiotherapy is used for treatment of various types of cancers. Due to the impossibility of measuring the absorbed dose delivered to different organs during irradiation, treatment planning systems (TPSs) have been utilized for calculation of absorbed dose before a radiotherapy procedure. Thus, the accuracy and precession of the TPS is essential.The aim of this study is investigation of...