Journal
RADIATION MEASUREMENTS
Volume 39, Issue 1, Pages 95-104Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.radmeas.2004.03.025
Keywords
cosmic ray muons; microdosimetry
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The contribution of the charged component of secondary cosmic radiation to the ambient dose equivalent H*(10) at ground level is investigated using the muon detector MUDOS and a TEPC detector surrounded by the coincidence detector CACS to identify charged particles. The ambient dose equivalent rate H*(10)(T) as measured with the TEPC/CACS is used to calibrate the MUDOS count rate in terms of H*(10). First results from long-term measurements at the PTB reference site for ambient radiation dosimetry are reported. The air pressure corrected dose rate shows, as expected, a strong correlation with the neutron count rate as measured with the Kiel neutron monitor. The measured seasonal variations exhibit a negative correlation with the temperature changes in the upper layers of the atmosphere where the ground level muons are produced. (C) 2004 Elsevier Ltd. All rights reserved.
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