total amount of energy released over a long period by the short-lived progeny in equilibrium with 100 pCi of radon. 1 WL = 2.08 × 10−5 J m−3.
Working level month (WLM):
A cumulative exposure equivalent to 1 working level for 1 working month (170 hours). 1 WLM = 2.08 × 10−5 J h m−3 × 170 h = 3.5 × 10−3 J h m−3.
(A) Electromagnetic radiation emitted in de-excitation of bound atomic electrons, frequently occurring in decay of radionuclides, referred to as characteristic x rays, or (B) electromagnetic radiation produced in deceleration of energetic charged particles (such as beta radiation) in passing through matter, referred to as continuous x rays or bremsstrahlung; also called x rays.
The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Assessment of the Scientific Information for the Radiation Exposure Screening and Education Program . Washington, DC: The National Academies Press,
Please select a format:
As of 2013, the National Science Education Standards have been replaced by the Next Generation Science Standards (NGSS), available as a print book, free PDF download, and online with our OpenBook platform.
The NGSS offer a detailed description of the key scientific ideas and practices that all students should learn by the time they graduate from high school. The standards are based largely on the 2011 National Research Council report A Framework for K-12 Science Education: Practices, Crosscutting Concepts, and Core Ideas.