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Radioactive Decay and Radiometric Dating02:48

Radioactive Decay and Radiometric Dating

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Radioactivity is a spontaneous disintegration of an unstable nuclide and is a random process, as all the nuclei in the sample do not decay simultaneously. The number of disintegrations per unit time is called the activity (A), which is directly proportional to the number of nuclei in the sample. The decay constant (λ) is an average probability of decay per nucleus in unit time.
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Updated: Dec 2, 2025

A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer
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RADON IN MINES OF KRYVYI RIH IRON ORE BASIN IN UKRAINE.

O Molchanov1, A Podrezov1, K Brechko1

  • 1Center of Radioecological Monitoring Ltd., Gagarina str. 40/4, Zhovti Vody, Ukraine.

Radiation Protection Dosimetry
|November 3, 2020
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Summary

Radon exposure is a significant radiation hazard in Kryvyi Rih Iron Ore Basin (Kryvbas) mines, exceeding safety standards in most locations. This study assesses risks to underground workers and proposes mitigation strategies.

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Area of Science:

  • Environmental Science
  • Occupational Health
  • Radiological Protection

Background:

  • Studies on radiation exposure in Kryvyi Rih Iron Ore Basin (Kryvbas) mines are recent, initiated approximately 20 years ago.
  • Radon presence is a widespread issue across the majority of Kryvbas mines.
  • Previous research identified elevated radiation safety standards in 6 out of 8 tested mines.

Purpose of the Study:

  • To present recent radiation survey findings in Kryvbas mines.
  • To assess occupational radiation doses and classify mines by radiation danger.
  • To analyze lung cancer incidence among miners and discuss improvement measures.

Main Methods:

  • Radiation surveys conducted in Kryvbas mines.
  • Measurement of radon and its decay products, specifically equilibrium equivalent concentration (EEC) of Radon-222.
  • Analysis of lung cancer incidence data in relation to age groups.

Main Results:

  • Radon is a prevalent issue in most Kryvbas mines.
  • Radiation safety standards for Radon-222 EEC were exceeded in 6 of 8 surveyed mines.
  • A classification of mines based on radiation danger was developed, alongside preliminary dose assessments for underground workers.

Conclusions:

  • Elevated radon levels pose a significant radiation risk to miners in Kryvbas.
  • Further investigation and implementation of radiation safety measures are crucial.
  • Understanding lung cancer incidence is vital for long-term miner health protection.