نتایج جستجو برای: radium content

تعداد نتایج: 417502  

2014
Ajay Kumar Saurabh Narang

In the present investigation, soil samples were collected from 10 villages belonging to Pathankot district, Punjab, India and assessed for radium content using LR-115 plastic detector. The ‘track etch’ technique has been employed for measuring the radium content. From the radium content, radon exhalation rates and mass exhalation rates were calculated for these samples. The mass exhalation rate...

A.A. Abojassim, D. Naji, L.A. Najam, T.A. Hussain,

Background: Hair dyes are the important materials widely used by various peoples in Iraq and other countries. The present work investigates the presence of the effective radium content and radon exhalation rate in hair dyes samples. Materials and Methods: Twenty  hair dyes  samples were collected from Iraqi markets. Sealed can technique using LR-115 type II plastic track detector s ha...

Journal: :Nuclear Technology and Radiation Protection 2018

Journal: :Journal - American Water Works Association 1954

Journal: :Bulletin of the Chemical Society of Japan 1940

2007
R. Randall Schumann

The fraction of radon atoms generated from radium decay that are released from into a rock or soil pore space is defined as the radon emanation coefficient, or emanating power, of the material. The emanation coefficient of rocks and soils typically varies between about 0.05 and 0.70, and an average value for soils is probably between 0.20 and 0.30. Geologic, pedologic, and climatic factors, inc...

2016
M. S. A. Khan

The measurements of radium content and radon exhalation rates in terms of mass and area in soil samples collected from various locations in the shahjahanpur District were carried by using cylindrical can technique(CCT) based on LR-115 type II plastic track detector. From the result it was found that the effective radium content in the study area varies from 0.485Bq/kg to 2.503Bq/kg with an aver...

2005
Michael Kitto John Green

Emanation of radon ( 222 Rn) from granite countertops was measured using continuous and integrating radon monitors, and in air collected from encapsulated pieces of the countertops. A majority of the countertops emitted a measurable amount of radon. Although the granites contained the precursors, no thoron ( 220 Rn) emanation was detected. Gamma-ray spectroscopy was used to determine amounts of...

Journal: :The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science 1909

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