Helle Karina Aage
Technical University of Denmark
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Publication
Featured researches published by Helle Karina Aage.
Journal of Radioanalytical and Nuclear Chemistry | 1997
Helle Karina Aage; Bertel Lohmann Andersen; A. Blom; Ib Jensen
The solubility of magnesium-ammonium-phosphate (struvite) has been studied employing radioisotope32P as tracer. The amount of sample in solution is determined by measuring the Cherenkov radiation due to the fast β-particles emitted from this radionuclide. The themodynamic solubility product is determined at various temperatures and compared with former results.
Applied Radiation and Isotopes | 2003
Helle Karina Aage; Uffe C C Korsbech
Within recent decades many radioactive sources have been lost, stolen, or abandoned, and some have caused contamination or irradiation of people. Therefore reliable methods for source recovery are needed. The use of car borne NaI(Tl) detectors is discussed. Standard processing of spectra in general can disclose strong and medium level signals from manmade nuclides. But methods for detecting low level signals from weak, distant or shielded sources can be improved. New methods for source detection and identification based on noise adjusted singular value decomposition and on area specific stripping of spectra are presented.
Applied Radiation and Isotopes | 1999
Helle Karina Aage; Uffe C C Korsbech; Kim Bargholz; Jens Hovgaard
A new technique for processing airborne gamma ray spectrometry data has been developed. It is based on the noise adjusted singular value decomposition method introduced by Hovgaard in 1997. The new technique opens for mapping of very low contamination levels. It is tested with data from Latvia where the remaining contamination from the 1986 Chernobyl accident together with fallout from the atmospheric nuclear weapon tests includes 137Cs at levels often well below 1 kBq/m2 equivalent surface contamination. The limiting factors for obtaining reliable results are radon in the air, spectrum stability and accurate altitude measurements.
International Journal of Environment and Pollution | 2003
Bent Lauritzen; Poul Astrup; Martin Drews; Hans Ejsing Jørgensen; Torben Mikkelsen; Søren Thykier-Nielsen; Helle Karina Aage; Uffe C C Korsbech; Kim Bargholz; Carlos Rojas-Palma; Raf Van Ammel
An atmospheric dispersion experiment was conducted using a visible tracer along with the routine releases of 41Ar from the BR1 research reactor in Mol, Belgium. Simultaneous measurements of plume geometry and radiation field from 41Ar decay were performed as well as measurements of the 41Ar source term and the meteorological parameters. Good overall agreement is found between measurement data and model results using the mesoscale atmospheric dispersion and dose rate model RIMPUFF.
Radiation Protection Dosimetry | 2004
Carlos Rojas-Palma; Helle Karina Aage; Poul Astrup; Kim Bargholz; Martin Drews; Hans Ejsing Jørgensen; Uffe C C Korsbech; Bent Lauritzen; Torben Mikkelsen; Søren Thykier-Nielsen; Raf Van Ammel
Applied Radiation and Isotopes | 2006
Helle Karina Aage; Uffe C C Korsbech; Kim Bargholz; Jens Hovgaard
Archive | 2002
Martin Drews; Helle Karina Aage; Kim Bargholz; Hans Ejsing Jørgensen; Uffe C C Korsbech; Torben Mikkelsen; Carlos Rojas-Palma; Raf Van Ammel
Archive | 2002
Hans Mellander; Helle Karina Aage; Simon Karlsson; Uffe C C Korsbech; Bent Lauritzen; Mark Smethurst
Radiation Protection Dosimetry | 2006
Helle Karina Aage; Uffe C C Korsbech; Kim Bargholz; S. Bystöm; M. Wedmark; S. Thorshaug
Spe Reservoir Evaluation & Engineering | 2006
Uffe C C Korsbech; Helle Karina Aage; Kathrine Hedegaard; Bertel Lohmann Andersen; Niels Springer