Matthiä, Daniel and Heber, Bernd and Reitz, Günther and Sihver, Lembit and Berger, Thomas and Meier, Matthias (2009) The ground level event 70 on December 13th, 2006 and related effective doses at aviation altitudes. Radiation Protection Dosimetry, 136 (4), pp. 304-310. Oxford University Press. DOI: 10.1093/rpd/ncp141 . ISSN Online 1742-3406 Print 0144-8420.
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The 70th ground level event in the records of the Neutron Monitor network occurred on 13 December 2006 reaching a maximum count rate increase at the Oulu station of more than 90 % during the 5 min interval 3.05–3.10 UTC. Thereafter, count rates gradually decreased registering increases of a few per cent above the galactic cosmic ray background after a few hours. The primary proton spectrum during the first 6 h after the onset of the event is characterised in this work by fitting the energy and angular distribution by a power law in rigidity and a linear dependence in the pitch angle using a minimisation technique. The results were obtained by analysing the data from 28 Neutron Monitor stations. At very high northern and southern latitudes, the effective dose rates were estimated to reach values of 25–30 μSv/h at atmospheric depth of 200 g/cm² during the maximum of the event. The increase in effective dose during north atlantic and polar flights was estimated to be in the order of 20 %.
|Title:||The ground level event 70 on December 13th, 2006 and related effective doses at aviation altitudes|
|Journal or Publication Title:||Radiation Protection Dosimetry|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 304-310|
|Publisher:||Oxford University Press|
|ISSN:||Online 1742-3406 Print 0144-8420|
|Keywords:||70th ground level event, Neutron Monitor network, galactic cosmic rays|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Space (old)|
|HGF - Program Themes:||W FR - Forschung unter Weltraumbedingungen (old)|
|DLR - Research area:||Space|
|DLR - Program:||W FR - Forschung unter Weltraumbedingungen|
|DLR - Research theme (Project):||W - Vorhaben Strahlenbiologie (old)|
|Institutes and Institutions:||Institute of Aerospace Medicine > Radiation Biology|
|Deposited By:||Kerstin Kopp|
|Deposited On:||01 Dec 2009 13:13|
|Last Modified:||20 Mar 2013 18:42|
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