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Related Experiment Videos

Radiation dosimetry using three-dimensional optical random access memories.

M Moscovitch1, G W Phillips, B M Cullum

  • 1Georgetown University School of Medicine, Department of Radiation Medicine, Washington DC 20007, USA. moscovim@georgetown.edu

Radiation Protection Dosimetry
|October 18, 2002
PubMed
Summary
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A novel radiation dosimetry method uses 3D optical random access memory (ORAM) to detect heavy charged particles (HCP) and neutrons. This technique analyzes radiation-induced bit-flips in ORAM for particle type and energy discrimination.

Area of Science:

  • Physics
  • Materials Science
  • Radiation Detection

Background:

  • Accurate dosimetry of heavy charged particles (HCP) and neutrons is crucial for various applications.
  • Current dosimetry methods may lack the ability to discriminate particle type and energy effectively.
  • Three-dimensional optical random access memory (3D ORAM) offers a novel material for radiation detection.

Purpose of the Study:

  • To present and validate a new radiation dosimetry approach utilizing 3D ORAM.
  • To demonstrate the capability of 3D ORAM for particle type and energy discrimination.
  • To explore the underlying physical mechanisms of radiation-induced changes in 3D ORAM.

Main Methods:

  • Utilizing radiation-induced changes in digital information stored on 3D ORAM (poly(methyl methacrylate) doped with photochromic dye).
Keywords:
Non-programmatic

Related Experiment Videos

  • Employing a Nd:YAG laser system for writing and reading binary information (bits) on the ORAM.
  • Analyzing laser-induced color changes ('bit-flips') at sites of energy deposition from incident radiation.

    • Main Results:

    • Theoretical calculations based on track structure theory (TST) predict measurable 'bit-flips' upon HCP interaction.
    • Experimental validation confirmed the theoretical predictions using two types of ORAM (spirobenzopyran and anthracene-based).
    • The study demonstrates the feasibility of using 3D ORAM for particle type and energy discrimination in radiation dosimetry.

    Conclusions:

    • 3D ORAM serves as a functional charged particle detector.
    • The observed 'bit-flips' in 3D ORAM correlate with energy deposition from HCP and neutron-recoil protons.
    • This innovative dosimetry method shows promise for advanced radiation detection and characterization.