نتایج جستجو برای: natural radionuclides

تعداد نتایج: 485083  

2007
J. U. Ahmed

36 I ublic awareness about exposure to natural sources of radiation has been growing in recent years at a rather accelerated pace. Exposure to high levels of radon indoors, for example, has drawn considerable attention, and a number of countries have already adopted regulatory measures to mitigate exposure to radon in existing houses and to establish radon limits for new buildings. Another area...

Introduction Artificial and natural radionuclides are found in diverse environmental compartments, such as water, soil, rocks, vegetables, animals, and human body tissues. As such, humans and environments are at constant exposure of these radiation types. In this research investigated specific activities of radionuclide and dose assessment of some species of mushrooms. Materials and Methods In ...

Journal: :Analytica chimica acta 2008
Xiaolin Hou Per Roos

The radiometric methods, alpha (alpha)-, beta (beta)-, gamma (gamma)-spectrometry, and mass spectrometric methods, inductively coupled plasma mass spectrometry, accelerator mass spectrometry, thermal ionization mass spectrometry, resonance ionization mass spectrometry, secondary ion mass spectrometry, and glow discharge mass spectrometry are reviewed for the determination of radionuclides. Thes...

Journal: :Applied sciences 2022

This study was carried out to determine the presence of main radionuclides from natural and artificial radioactivity in soil Kosovo, using gamma-ray spectroscopy. The mean activity concentration for Ra-226, Th-232, K-40, Cs-137 22.32 ± 1.41, 22.14 1.31, 358.16 8.85, 12.94 0.44 Bq/kg, respectively. Radium equivalent ranged 47 100 Bq/kg. calculated values gamma index (Iγ), external hazard (Hex), ...

Journal: :iranian journal of nuclear medicine 1994
roghayeh bagherzadeh akbari

this study aims to give data concrning phantom material made in iran i'rom a natural rubber which is used for obtaining calibration data for patient dose measurements in nuclear medicine applications of radionuclides for therapy and diagnosis.is showed to be a tissue equivalent material cheap (25000 rials the material itself and 35000 rials the process of casting and moulding etc.), easily avai...

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