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Biological Effects of Radiation02:59

Biological Effects of Radiation

All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they produce ions...
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Related Experiment Video

Updated: Jul 19, 2026

A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space
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Automatic neutron dosimetry system based on fluorescent nuclear track detector technology.

M S Akselrod1, V V Fomenko2, J A Bartz3

  • 1Landauer, Inc., 723 1/2 Eastgate St., Stillwater, OK 74074, USA makselrod@landauerinc.com.

Radiation Protection Dosimetry
|November 29, 2013
PubMed
Summary

A new automatic fluorescent nuclear track detector (FNTD) reader offers electronic-free neutron dosimetry. This system uses confocal laser scanning fluorescence imaging for accurate neutron dose measurement from 0.1 mSv to 20 Sv.

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Area of Science:

  • Medical Physics
  • Radiation Detection and Measurement
  • Materials Science

Background:

  • Traditional neutron dosimetry often relies on electronic or battery-dependent detectors.
  • Aluminium oxide crystals offer a luminescent, integrating detector solution for radiation monitoring.
  • Accurate neutron detection is crucial for radiation protection and research.

Purpose of the Study:

  • To introduce and characterize a novel automatic fluorescent nuclear track detector (FNTD) reader.
  • To enable electronic-free neutron dosimetry using advanced optical imaging techniques.
  • To establish a robust system for measuring a wide range of neutron doses and energies.

Main Methods:

  • Utilized a confocal laser scanning fluorescence imaging system for non-destructive detector readout.
  • Developed a fully automatic table-top reader with capacity for 216 detectors.
  • Implemented optical character recognition for detector ID and dual-contrast imaging (fluorescence and reflected laser light) to differentiate true tracks from crystal imperfections.

Main Results:

  • The FNTD reader successfully measures neutron doses ranging from 0.1 mSv to 20 Sv.
  • The system is effective for neutron energies from thermal to 20 MeV.
  • The reader demonstrated accurate track identification, distinguishing from surface and volume crystal defects.

Conclusions:

  • The developed automatic FNTD reader provides a robust, user-friendly, and efficient solution for neutron dosimetry.
  • This electronic-free system offers a significant advancement in radiation detection technology.
  • The system's capabilities support accurate neutron dose assessment across diverse applications.