Accession Number : ADA602275


Title :   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


Descriptive Note : Technical Report


Corporate Author : AIR FORCE SAFETY CENTER KIRTLAND AFB NM


Personal Author(s) : Rademacher, Steven


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a602275.pdf


Report Date : Mar 2014


Pagination or Media Count : 22


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.


Descriptors :   *COSMIC RAYS , *DETECTORS , *RADIATION DOSAGE , CHAMBERS , CULTURE , DEPARTMENT OF DEFENSE , DOSE RATE , EARTHQUAKES , INSTRUMENTATION , IONIZATION CHAMBERS , LIMITATIONS , PORTABLE EQUIPMENT , PRESSURE VESSELS , RADIATION , RESPONSE , SOLID STATE ELECTRONICS , SOURCES , TEST AND EVALUATION , VALUE


Subject Categories : Nuclear Physics & Elementary Particle Physics


Distribution Statement : APPROVED FOR PUBLIC RELEASE