PHOTON, NEUTRON AND CHARGED PARTICLE ABSORBED DOSE MEASUREMENTS WITH A PORTABLE MICROCALORIMETER.
Abstract
Two compact, portable microcalorimeters were built and used to measure absorbed dose. A thermal shield near liquid nitrogen temperature provides the necessary isothermal environment for the absorber. Temperature increase of the absorber during irradiation is measured with a thermistor. Tissue equivalent plastic and beryllium absorbers were calibrated for absorbed energy as a function of temperature change by exposures to standard Co60 and Cs137 gamma-ray sources. The beryllium absorber detected gamma-ray doses as low as 0.17 rads (17 ergs/g) with a standard error of 6 percent. Microcalorimetric measurements of absorbed dose from continuous and pulsed X-rays, reactor neutrons, and charged particles were compared to measurements with other dosimeter systems. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 28, 1966
- Accession Number
- AD0630693
Entities
People
- Eugene R. Schleiger
- Eugene Tochilin
- Norman Goldstein
Organizations
- Naval Radiological Defense Laboratory