Beta and gamma dose rates from terrestrially distributed sources.
نویسندگان
چکیده
Dose rates in air and at various depths in tissue produced by concentrations of natural isotopes in the ground are calcu lated for both beta and gamma radiation. Calculated gonadal "screening factors" are within k$ of the experimental values reported by the British Medical Research Council*
منابع مشابه
Gamma background radiation measurement in Lorestan province, Iran
Background: The exposure of human being to ionize radiation from natural sources is a continuing, inescapable feature of life on earth. Direct measurement of absorbed dose rates in air has been carried out in many countries of the world during the last few decades. Such investigations can be useful for assessment of public dose rates, the performance of epidemiological studies, and kee...
متن کاملEvaluation of Organ Specific peripheral dose for Gamma knife 4C based on Monte Carlo
Introduction: Stereotactic Gamma Knife radiosurgery has been widely used for treating brain tumors. The scattered radiation outside of treatment field (peripheral dose) can induce the secondary cancer to specific organ. This paper investigated the absorbed dose to eyes, thyroid, heart, lung, breast and colon using a Monte Carlo technique for Mird phantom. We also study the ef...
متن کاملNatural Gamma Radiation in Primary Schools of Zanjan Province
Background: Environmental gamma ray refers to the gamma radiation from terrestrial sources and building materials. In enclosed spaces radiation can become a health hazard leading to potential increase in the rates of lung cancer. The goal of this study is to assess the exposure to natural gamma radiation of children in the schools of Zanjan province. Method:The natural gamma radiation was asse...
متن کاملبررسی آهنگ دوز گامای محیطی در شهرهای اردبیل و سرعین در سال 1387
Background and Objectives: Gamma rays, the most energetic photons within the any other wave in the electromagnetic spectrum, pose enough energy to form charged particles and adversely affect human health. Provided that the external exposure of human beings to natural environmental gamma radiation normally exceeds that from all man-made sources combined, environmental gamma dose rate and corresp...
متن کاملشبیه سازی آهنگ دز جذب شده سیب درختی در سامانه گاما سل 220 با استفاده از کد MCNPX
In this study, the dose rates in a gamma cell 220 device for apple were calculated by using MCNPX code in two states. In first state, apple uniformly fills the whole space of gamma cell. In second state, it was supposed that apples are spherical form that the empty space between them is filled by air. Generally, the results show that in both states the distributed dose rates are non-uniform. In...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Radiation research
دوره 9 2 شماره
صفحات -
تاریخ انتشار 1958