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Related Experiment Videos

Radiation dosimetry using three-dimensional optical random access memories.

M Moscovitch1, G W Phillips

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

Nuclear Instruments & Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms
|February 28, 2002
PubMed
Summary
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Three-dimensional optical random access memory (3D ORAM) materials can detect ionizing radiation. Changes in stored data and fluorescence reveal particle type, energy, and absorbed dose, enabling new dosimetry applications.

Area of Science:

  • Materials Science
  • Physics
  • Radiation Detection

Background:

  • Three-dimensional optical random access memories (3D ORAMs) utilize photochromic molecules for high-density data storage.
  • These materials undergo reversible transformations triggered by light for binary information storage and retrieval.

Purpose of the Study:

  • To investigate the application of 3D ORAM materials for radiation dosimetry.
  • To determine if ionizing radiation can alter stored information in 3D ORAMs.
  • To establish a method for measuring absorbed dose, particle type, and energy using 3D ORAMs.

Main Methods:

  • Theoretical and experimental analysis of 3D ORAM material response to ionizing radiation.
  • Exposure of 3D ORAM materials to various heavy charged particles (protons, alpha particles, 12C ions).
Keywords:
NASA Discipline Radiation HealthNon-NASA Center

Related Experiment Videos

  • Analysis of changes in stored information and laser-induced fluorescence intensity and depth.
  • Modeling of radiation effects using Monte Carlo simulations.

    • Main Results:

    • Ionizing radiation, specifically heavy charged particles, alters the stored binary information in 3D ORAM materials.
    • The magnitude and spatial distribution of these alterations correlate with absorbed dose, particle type, and energy.
    • Exposed materials exhibit laser-induced fluorescence, with intensity and depth dependent on particle characteristics.
    • Monte Carlo simulations accurately model these observed effects.

    Conclusions:

    • 3D ORAM materials show significant potential for radiation dosimetry applications.
    • The observed radiation-induced changes and fluorescence provide a basis for developing novel detectors for charged particles and neutrons.
    • The developed models enhance understanding of material properties for future detector design.