Cosmic Radiation and Radioactivity

Measurement and Monitoring of the Radiation Dose in the Atmosphere

Environmental Research Station Schneefernerhaus

Cosmic Radiation

The UFS Schneefernerhaus is the only research station at mountain altitudes worldwide that includes a Bonner spheres spectrometer, to monitor secondary neutrons from cosmic radiation. The spectrometer was installed in 2005 by the Institute of Radiation Protection of the HMGU, and complemented by a second spectrometer that was installed in 2007 at the Koldewey Station on Spitzbergen. Together, these spectrometers allow continuous measurements of both the intensity of secondary neutrons from cosmic radiation and their energy distribution, at low atmospheric shielding (UFS) and low geomagnetic shielding (Koldewey Station). The measurement results are used to validate energy spectra of cosmic ray particles calculated.

Helmholtz Zentrum München

Immision Monitoring of Radioactivity

The Bavarian Environment Agency together with the German Meteorological Service operates a network of stations to monitor the immission of radioactivity. These stations run automatically and cover the entire state.

Bayerisches Landesamt für Umwelt, Deutscher Wetterdienst

Radon in the Atmosphere

Radon (222Rn) is part of the radioactive series of naturally occuring uranium. As a noble gas it may easily escape from the ground to the atmosphere. The radon concentration and ground level depends on geological properties of the soil. It's half life is 3.8 days. The 222Rn concentration in the air is a valuable tracer for continental airmasses as it will be considerably lower in oceanic air or air that has experienced long range transport in great hights. For this reason 222Rn is measured at the GAW Globalstation Zugspitze/Hohenpeißenberg by the German Meteorological Service (DWD).

Deutscher Wetterdienst

Radioecology in the snow

Radioecological analysis shall be used in winter season for the alpine region, considering the whole exposure path from deposition on and with snow, accumulation of radionuclides in old snow and the input in mountain streams at snow melt.

Helmholtz Zentrum München

Contact
Prof. Dr. Werner Rühm
Helmholtz Zentrum München
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Tel. +49 89 3187-2460
Fax +49 89 3187-3323

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