Evaluation of Differences in Response of DOD Portable Instruments and Solid-State Detectors used by MEXT for Measurement of External Radiations with Attention to the Cosmic Radiation Component

Abstract

This report discusses cosmic radiation and summarizes its contributions to radiation dose from external sources and the implications on measurement of external dose-rate using either pressurized ion chambers (PICs) or thallium-activated sodium iodide [NaI(Tl)]. The report finds that some NaI(Tl) systems under respond to cosmic radiation above 3 MeV deposited energy. These differences are offered as one of several contributors to the lower values of external dose rates measured by Japan s Ministry of Education, Culture, Sports, Science, and Technology (MEXT) using NaI(Tl) compared to DOD/DOE measurements using PICs. The report concludes that such limitations must be accounted for in performing assessments of dose from external sources.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2014
Accession Number
ADA602275

Entities

People

  • Steven Rademacher

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Chambers
  • Charged Particles
  • Cosmic Rays
  • Department Of Defense
  • Detection
  • Detectors
  • Dose Rate
  • Energy Transfer
  • Galactic Cosmic Rays
  • Gamma Rays
  • Health
  • Ionization
  • Ionization Chambers
  • Ionizing Radiation
  • Measurement
  • Radioactive Decay
  • Sea Level

Fields of Study

  • Physics

Readers

  • Nuclear and Radiation Engineering.