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Mapping Microvascular Flow via Radon Transform Ultrasound: Technical Advances and Pilot Application. [PDF]

BME Front
Yin J, Huang L, Zhang J, Lok UW, DeRuiter RM, Zhu XY, Krier JD, Kim Y, Zhao Y, Ji K, Lucien F, Lerman LO, Chen S, Huang C.   +13 more
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Radon Flux Measurement System

Health Physics, 2023
Abstract Disposal of naturally occurring radioactive material (NORM) and technologically enhanced naturally occurring radioactive material (TENORM) waste in the State of Oregon is prohibited unless it can be demonstrated that the material is nonradioactive as defined by its radionuclide content and potential for emission into the environment.
Emily A, Caffrey, Colby D, Mangini, Arthur S, Rood, Helen A, Grogan, John E, Till   +4 more
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Radon and radon progeny measurements

TrAC Trends in Analytical Chemistry, 1991
Abstract Radon and its decay products are considered a potentially hazardous component of indoor air and thus the measurement of these airborne radionuclides is important in accurately assessing the threat that they might pose. There are a variety of methods available for the measurement of both radon gas and its decay products.
Philip K. Hopke, Piotr Wasiolek
openaire   +1 more source

Measurement of radon and radon progenies at the German radon reference chamber

Applied Radiation and Isotopes, 2000
The activity concentration of radon in the environment can vary over five orders of magnitude. Radon and its progenies thus concern all people involved in radiation protection as well as in low-level experiments. In the German radon reference chamber at the PTB, radon and its progenies are measured with different systems for alpha- and gamma ...
A, Paul, A, Honig, S, Röttger, U, Keyser   +3 more
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Radon and Radon Daughter Measurements in Solar Buildings

Health Physics, 1983
Measurements of radon and radon daughters in 11 buildings in five states, using active or passive solar heating, showed no significant excess in concentrations over the levels measured in buildings with conventional heating systems. Radon levels in two buildings using rock storage in their active solar systems exceeded the U.S.
A C, George, E O, Knutson, H, Franklin
openaire   +2 more sources

A transistorized radon measuring equipment

Journal of Scientific Instruments, 1966
An apparatus is described for the simultaneous measurement of three samples of radon at activities ranging from 5 × 10-14 to 3 × 10-8 curie. The method used is electrostatic collection of the radon decay products followed by alpha scintillation counting.
P B, Roberts, B L, Davies
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Measurement of radon levels in buildings by spectroscopic measurement of radon progeny

IEEE Nuclear Science Symposium & Medical Imaging Conference, 2010
A fast, simple and low cost system for measuring radon levels by spectroscopic measurement of radon progeny has been developed. A spectrum with energy resolution of the decays from 218Po and 214Po is provided. The fast measurement makes it possible to control ventilation to keep the radon level below the limit without excess energy loss due to over ...
Anna Fröjdh, Göran Thungström, Christer Fröjdh, Sture Petersson   +3 more
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Strictly Positive Radon Measures

Journal of the London Mathematical Society, 1994
Let \(X\) be topological Hausdorff space and let \(O\) be an open subset of \(X\). By definition a function \(u: X\to [0,\infty)\) belongs to \(H_ O(X)\) if for every \(\alpha>0\) the set \(\{u\geq \alpha\}\) is a compact subset of \(O\). A Radon measure \(\mu\) is said to be supported by \(X\), if \(\mu(O)\) is strictly positive for every non-void ...
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Radon measurements with a PIN photodiode

Applied Radiation and Isotopes, 2006
Silicon photodiodes are well suited to detect alphas coming from different sources as neutron reactions or radon daughters. In this work a radon in air detecting device, using an 18x18 mm silicon PIN photodiode is studied. The ionized airborne decay products formed during radon diffusion were focused by an accelerating high voltage to the PIN surface ...
A, Martín-Martín, J L, Gutiérrez-Villanueva, J M, Muñoz, M, García-Talavera, G, Adamiec, M P, Iñiguez   +5 more
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