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Neutron detection via bubble chambers.

D V Jordan1, J H Ely, A J Peurrung

  • 1Pacific Northwest National Laboratory, MS P8-20, P.O. Box 999, Richland, WA 99352, USA. david.jordan@pnl.gov

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|July 12, 2005
PubMed
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Pressure-cycled bubble chambers show promise for fast neutron detection. These chambers are sensitive to neutrons but not gamma rays, offering a selective detection method.

Area of Science:

  • Nuclear physics
  • Radiation detection technologies

Background:

  • Fast neutron detection is crucial for various applications, including nuclear security and research.
  • Traditional detection methods can be complex and expensive.
  • Bubble chambers offer a potentially simpler and more cost-effective alternative.

Purpose of the Study:

  • To investigate the feasibility of using pressure-cycled bubble chambers for fast neutron detection.
  • To evaluate the sensitivity and selectivity of these chambers to neutron sources.
  • To characterize the bubble formation dynamics and acoustic signals.

Main Methods:

  • Experiments were conducted using Halon-filled and Freon-134a pressure-cycled bubble chambers.
  • An Americium-Beryllium (AmBe) neutron source and a Cesium-137 (137Cs) gamma source were used for testing.

Related Experiment Videos

  • High-speed photography documented bubble formation.
  • A piezoelectric transducer recorded the acoustic signature of bubble nucleation.

    • Main Results:

    • The Halon-filled chamber demonstrated clear sensitivity to the AmBe neutron source.
    • The Halon-filled chamber showed insensitivity to the 137Cs gamma source, indicating selectivity.
    • High-speed imaging captured the bubble nucleation process in both Halon and Freon-134a chambers when exposed to neutrons.

    Conclusions:

    • Pressure-cycled bubble chambers are a viable technology for selective fast neutron detection.
    • The observed sensitivity and selectivity suggest potential for applications in nuclear monitoring.
    • Further research can optimize chamber design and operational parameters for enhanced performance.