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Displaying records 231 to 233.
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231. Development of an Ultra-Pure, Carrier-Free 209Po Solution Standard
Series: Journal of Research (NIST JRES)
Topic: Physics
Published: Date unknown
Authors: Ronald Colle, Ryan P Fitzgerald, Lizbeth Laureano-Perez
Abstract: Ultra-pure, carrier-free 209Po solution standards have been prepared and standardized for their massic alpha-particle emission rate. The standards, which will be disseminated by the National Institute of Standards and Technology (NIST) as Standard Re ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=918599

232. Observations and modeling of normal-metal/insulator/superconductor refrigerator cooling from 300 mK to below 100 mK
Topic: Physics
Published: Date unknown
Authors: Galen C O\'Neil, Peter J Lowell, Joel Nathan Ullom, Jason M Underwood
Abstract: In a refrigerator, heat is moved from one system to another and this movement requires an additional dissipated power. It is desirable to both isolate the cooled system, so that its temperature may differ from the bath, and to heatsink the heated sys ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909267

233. Stopwatch and Timer Calibrations (2009 edition)
Series: Special Publication (NIST SP)
Report Number: 960-12
Topic: Physics
Published: Date unknown
Authors: Jeff C Gust, Robert M. Graham, Michael A Lombardi
Abstract: Stopwatch and timer calibrations are perhaps the most common calibrations performed in the field of time and frequency metrology. Hundreds of United States laboratories calibrate many thousands of timing devices annually to meet legal and organizatio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50659



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