Passive environmental neutron dosimeter

Conference · Mon Jul 01 04:00:00 EDT 1974

OSTI ID:4054066

Apt, K E; Schiager, K J; Vogt, J R; Meyer, W ^[1]

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1. eds.

A passive environmental neutron dosimeter was developed for use in the environs of the Clinton P. Anderson Meson Physics Facility. The dosimeter is a 0.25-m-diam spherical polyethylene moderator which incorporates 2 fission- fragment track registry assemblies. Enriched $sup 235$U serves as the fission radiator, and 10-$mu$m-thick polycarbonate foil is the fission-track registry material. Latent fission tracks are chemically etched with base and subsequently counted with an automatic digital spark counter system. The neutron dosimeter is insensitive to radiation other than neutrons, and an exposed registry foil becomes a permanent record of integrated neutron dose equivalent. The dosimeter response is approximately proportional to the incident neutron dose equivalent. Calibration and field exposures indicate that dose equivalent values as low as 0.1 mrem can be accurately measured. The environmental neutron dosimeter in conjunction with thermoluminescent dosimetry materials has been used to characterize environmental radiation levels resulting from nuclear accelerator operations.

• Research Organization: Los Alamos Scientific Lab., NM; Missouri Univ., Columbia (USA). Coll. of Engineering
• NSA Number: NSA-33-023373
• OSTI ID: 4054066
• Report Number(s): CONF-740701--
• Country of Publication: United States
• Language: English

Related Subjects

*DIELECTRIC TRACK DETECTORS-- PERFORMANCE
*LAMPF LINAC-- RADIATION MONITORING
*MODERATING DETECTORS-- PERFORMANCE
*NEUTRON DOSIMETRY-- MODERATING DETECTORS
440102* --Instrumentation--Radiation Instrumentation-- Radiation Dosemeters
BACKGROUND RADIATION
CALIBRATION
ENVIRONMENT
FISSION FOIL DETECTORS
FISSION TRACKS
N44300 --Environmental & Earth Sciences--Radioactivity Monitoring & Transport
N46120* --Instrumentation--Radiation Detection Instruments-- Radiation Dosimeters
SENSITIVITY