- 産業: Education
- Number of terms: 3412
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Harvard University is the oldest institution of higher learning in the United States. It was established in 1636 by the Massachusetts legislature and named after its first benefactor, John Harvard. Located in Cambridge, Massachusetts, Harvard University is an Ivy League university.
A radiation detection instrument comprised of a phosphor, photomultiplier tube(s), and associated electronic circuits for counting light emissions produced in the phosphor by ionizing radiation.
Industry:Environment
Radioactive material that is permanently bonded or fixed in a capsule or matrix designed to prevent release and dispersal under the most severe conditions which are likely to be encountered in normal use and handling.
Industry:Environment
Radiation originating as the result of absorption of other radiation in matter. It may be either electromagnetic (e.g. Bremstrahlung from 32P betas passing through lead) or particulate in nature.
Industry:Environment
Applies to the external exposure of the skin or an extremity. This is the dose equivalent at a tissue depth 0. 007 cm averaged over an area of 1 square centimeter.
Industry:Environment
Any material or obstruction that absorbs radiation and thus tends to protect personnel or materials from the effects of ionizing radiation.
Industry:Environment
Any portable radiation detection instrument especially adapted for inspecting an area to establish the existence and amount of radioactive material or contamination present.
Industry:Environment
A crystalline material which emits light when heated after radiation exposure; used in dosimetry.
Industry:Environment
Refers to the head, trunk (including gonads), arms above the elbow, and legs above the knee.
Industry:Environment
Wiping of 100 square centimeters of a surface with a filter paper or a cotton swab for the purpose of determining if removable contamination is present. The wipe is then analyzed with a radiation detection instrument, such as a survey meter or a LSC).
Industry:Environment
Penetrating electromagnetic radiation (photon) having a wavelength that is much shorter than that of visible light. They can be produced by excitation of the electrons around certain nuclei (characteristic x-rays) or by the interaction of high speed electrons with the electric fields around nuclei.
Industry:Environment
