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Practical neutron dosimetry with superheated drops.

R E Apfel1, Y C Lo

  • 1Yale University, New Haven, CT 06520.

Health Physics
|January 1, 1989
PubMed
Summary
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The Superheated Drop Detector (SDD) shows potential for rem-response neutron detection. Its measured response aligns with ideal dose equivalent curves, validating its use in neutron dosimetry and monitoring.

Area of Science:

  • Nuclear instrumentation
  • Radiation detection physics

Background:

  • The Superheated Drop Detector (SDD) operates on bubble chamber principles using superheated fluid drops.
  • Previous work established theoretical models for neutron detection thresholds and response functions.

Purpose of the Study:

  • To develop and validate a theoretical model for Superheated Drop Detector (SDD) neutron detection.
  • To assess the feasibility of creating a rem-response SDD for neutron dosimetry.

Main Methods:

  • Theoretical modeling of bubble nucleation threshold and energy-dependent response.
  • Experimental calibration of SDDs using 252Cf neutron sources.
  • Comparison of measured response with theoretical predictions and ICRP dose equivalent curves.

Main Results:

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  • Theoretical calculations showed good agreement with experimental measurements.
  • The SDD response curve followed the trend of the ideal ICRP dose equivalent curve within 40% above 100 keV.
  • Calibration with 252Cf sources confirmed the model's validity for various neutron energies.

Conclusions:

  • A valid theoretical model for SDD neutron detection has been developed.
  • The Superheated Drop Detector is a viable option for rem-response neutron dosimetry.
  • The detector shows promise for applications in area monitoring and neutron spectrometry.