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159 453 (0,294s)

Výsledek výzkumu

Terrestrial radiation

K, U, Th source of terrestrial natural radiation, terrestrial gamma rays, dose rate of rock environment, dose rate of nuclear fallout, instruments and methods, calibration of radiometric instrumen...

Geology

  • 2020
  • C
  • Odkaz
Výsledek výzkumu

Natural radioactivity of fresh and hydrothermally altered rocks at the locality Pohled (Moldanubicum)

unaltered granite (K 3.0 %, Th 13.3 ppm), whereas content of U is the same, 6.0 ppm. Gneisses contained 1.3 % K, 2.8 ppm Th and 2.2 ppm U. During alteration, increase of all elements was observed...

DD - Geochemie

  • 2011
  • Jx
Výsledek výzkumu

Radioactivity of sedimentary rocks over the Ždánice hydrocarbon field

Radioactivity of rocks above hydrocarbon field Ždánice (Czech Republic) was studied by surface geophysical measurements. Natural radioelements K, U and Th in rocks decrease above oil field....

DD - Geochemie

  • 2006
  • Jx
Výsledek výzkumu

Determination of U, Th and K in bricks by gamma -ray spectrometry, X-ray fluorescence analysis and neutron activation analysis

bricks is caused mostly by contributions of the natural radionuclides U-238, Th-232 important. nnThe concentrations of U-238, Th-232 and K-40 were measured by variousKnowledge of the con...

Analytical chemistry

  • 2017
  • Jimp
  • Odkaz
Výsledek výzkumu

Detailed gamma-ray spectrometric analysis of natural radionuclides of K, U, and Th on the Sudetic Marginal Fault

Concentrations of natural radionuclides of K, U and Th along vertical profile of a research trench studying the Sudetic Marginal Fault were established by detailed focused gamma-ray spectrometric measureme...

DB - Geologie a mineralogie

  • 2015
  • Jx
  • Odkaz
Výsledek výzkumu

Radioactivity of uranium production cycle facilities in the Czech Republic compared to the natural environment

Radioactivity of uranium mining wastes, determined by field gamma-ray spectrometry, and expressed in gamma dose rate and concentration of K, U and Th, was compared to the radioactivity of the natural environmen...

DL - Jaderné odpady, radioaktivní znečištění a kontrola

  • 2002
  • D
Výsledek výzkumu

Geochemical and geophysical anomalies at the Ždánice oil- and gas field, SE Czech Republic

the field found perceptible decreases of K,U,Th concetrations relative to beckground values.This can by explained in therms of enhanced leaching of these radionuclides from 18 shalowboreholes pointed to a trend of...

DD - Geochemie

  • 2008
  • Jx
Výsledek výzkumu

Natural Radioactivity of the Rock Environment in the Caves in Slovak Republic

Concentrations of natural radioactive elements were measured in karst rocks measurements carried out in the karst areas in Slovakia have shown, that K and Th contents in carbonate rocks of the cave system ...

DB - Geologie a mineralogie

  • 2003
  • B
Výsledek výzkumu

Natural radioactivity of the rock environment in Czech show caves (Bozkov Dolomite Caves, Koněprusy Caves, Chýnov Cave)

Concentrations of natural radioactive elements (K, U and Th) were measured using a field gamma-ray spectrometer GS-256 in the rocks in the Bozkov Dolomite Caves area is 138 Bq.kg-1 (up to 12 ppm U...

DB - Geologie a mineralogie

  • 2005
  • Jx
Výsledek výzkumu

Remediation of Uranium Mining Areas in the Czech Republic

Areas contaminated with radionuclides are near the places of mining and processing of U ores. The most contaminated areas in the Czech Republic are located near Straz pod Ralskem (chemical leaching), Rozna, and Mydlovary (U...

DK - Kontaminace a dekontaminace půdy včetně pesticidů

  • 2013
  • Jx
  • Odkaz
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