Results 211 to 220 of about 5,619 (263)

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
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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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Indoor Radon Measurement in Van

AIP Conference Proceedings, 2007
In this study, indoor radon concentrations obtained from the radon surveys conducted in the Van. Radon monitoring was performed by applying a passive, time‐integrating measuring technique. For this purpose, CR‐39 nuclear track detectors were installed in dwellings for 2 months. After the monitoring period, detectors were collected. In order to make the
Celebi, N., Dogan, I., Osmanlioglu, A. E., Kam, E.   +3 more
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Measurement of Radon Daughters in Air

Health Physics, 1972
AbstractA simple method for determination of RaA, RaB and RaC has been developed which has a sensitivity of the order of 1 pCi/l. for each nuclide. An air sample is obtained and the total alpha disintegrations in three selected time intervals after the end of air sampling determined.
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Sparsity Regularization for Radon Measures

2009
In this paper we establish a regularization method for Radon measures. Motivated from sparse L 1 regularization we introduce a new regularization functional for the Radon norm, whose properties are then analyzed. We, furthermore, show well-posedness of Radon measure based sparsity regularization.
Otmar Scherzer, Birgit Walch
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Quasi-Radon measures and Radon measures of type ({ie142-1}))

Rendiconti del Circolo Matematico di Palermo, 1991
It is proves that a quasi-Radon is equivalent to (complete and local determined) a.e. locally finite Radon measure of type ({ie142-2}). Also it is proves that every Randon measure of tipe ({ie142-3}) is strictly localizable.
openaire   +1 more source