Abstract：
:During anthropogenic activities, such as agricultural soil management and traffic on unpaved roads, size distribution measurements were performed of atmospheric particulate radionuclides at a site in the Chernobyl 30-km exclusion zone. Analysis of cascade impactor measurements showed an increase of the total atmospheric radioactivity. In the cases of harrowing by a tractor and traffic on unpaved roads, a common shape of the size distribution was found with two maxima, the first in the 2-4 microm range, the second in the 12-20 microm range. The size distributions were compared to measurements during wind-driven resuspension. Particle number concentration measurements with an Aerodynamic Particle Sizer showed a dynamic dependence of the particle concentration in different size ranges on anthropogenic action. The increase of the mean concentration was for the large particles more than one order of magnitude higher than for fine particles during anthropogenic enhanced resuspension. From the measurement of the mass concentration, the radioactive loading could be estimated. An enrichment of radionuclides on resuspended particles (compared to soil particles) was found, with the highest enrichment for large particles. Micrometeorological considerations showed that large particles may frequently be subject to medium range transport. The dry deposition velocity was measured; the mean value of 0.026 m s(-1) +/- 0.016 m s(-1) is typical for 6-9 microm diameter particles.
journal_name
Radiat Environ Biophysjournal_title
Radiation and environmental biophysicsauthors
Garger EK,Paretzke HG,Tschiersch Jdoi
10.1007/s004110050118subject
Has Abstractpub_date
1998-10-01 00:00:00pages
201-8issue
3eissn
0301-634Xissn
1432-2099journal_volume
37pub_type
杂志文章abstract：:A human total-body counter was designed and built with two 20 X 10 cm NaI (Tl) crystals suspended over an "isoresponse surface" upon which the subject reclines. This surface is curved from head to knee and from left to right, so that a gamma-ray emitting object is detected with equal efficiency when placed anywhere up...
journal_title：Radiation and environmental biophysics
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journal_title：Radiation and environmental biophysics
pub_type： 杂志文章,评审
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journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
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更新日期：1975-12-04 00:00:00
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journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/BF01340573
更新日期：1979-01-01 00:00:00
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更新日期：2013-03-01 00:00:00
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journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
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更新日期：1992-01-01 00:00:00
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journal_title：Radiation and environmental biophysics
pub_type： 历史文章,杂志文章,评审
doi：10.1007/s00411-003-0182-y
更新日期：2003-04-01 00:00:00
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journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/BF01323750
更新日期：1982-01-01 00:00:00
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journal_title：Radiation and environmental biophysics
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journal_title：Radiation and environmental biophysics
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journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
doi：10.1007/BF01212802
更新日期：1993-01-01 00:00:00
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journal_title：Radiation and environmental biophysics
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更新日期：2010-03-01 00:00:00
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pub_type： 杂志文章
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更新日期：1985-01-01 00:00:00
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pub_type： 杂志文章
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pub_type： 杂志文章
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更新日期：2013-05-01 00:00:00
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journal_title：Radiation and environmental biophysics
pub_type： 杂志文章,评审
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更新日期：2000-03-01 00:00:00
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journal_title：Radiation and environmental biophysics
pub_type： 杂志文章
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更新日期：2002-06-01 00:00:00
