Journal of Research of the National Bureau of Standards, Volume 85U.S. Department of Commerce, National Bureau of Standards, 1980 |
From inside the book
Results 1-5 of 100
Page
... measurement systems combined with calibration mixes which differ in isotopic ratio significantly from the standard can result in errors in the correction factors which are larger than the precision of the ratio measurements . The mass ...
... measurement systems combined with calibration mixes which differ in isotopic ratio significantly from the standard can result in errors in the correction factors which are larger than the precision of the ratio measurements . The mass ...
Page 3
... measurement systems combined with calibration mixes which differ in isotopic ratio significantly from the standard can result in errors in the correction factors which are larger than the precision of the ratio measurements . The mass ...
... measurement systems combined with calibration mixes which differ in isotopic ratio significantly from the standard can result in errors in the correction factors which are larger than the precision of the ratio measurements . The mass ...
Page 20
... measurements , therefore it is necessary to optimize the measurement conditions . This can be done by increasing the activity ( by measuring a group of sources ) , using the largest - volume ionization chamber that is suitable , and us ...
... measurements , therefore it is necessary to optimize the measurement conditions . This can be done by increasing the activity ( by measuring a group of sources ) , using the largest - volume ionization chamber that is suitable , and us ...
Page 21
... measurements of iridium - 192 sources . Correction Wall absorption correction for 50-1 standard graphite cavity ... measurements k ,, ( 0.5 ) 0.993 k ,, ( 1.0 ) 0.972 60 6.091 5.998 1.016 100 3.688 3.627 1.017 150 2.831 2.790 1.015 Air ...
... measurements of iridium - 192 sources . Correction Wall absorption correction for 50-1 standard graphite cavity ... measurements k ,, ( 0.5 ) 0.993 k ,, ( 1.0 ) 0.972 60 6.091 5.998 1.016 100 3.688 3.627 1.017 150 2.831 2.790 1.015 Air ...
Page 22
... measurement . The measurements show that the concrete floor increases the chamber reading by about 16 percent , when the source is on the concrete floor , over that measured when the source and chamber are suspended in the center of the ...
... measurement . The measurements show that the concrete floor increases the chamber reading by about 16 percent , when the source is on the concrete floor , over that measured when the source and chamber are suspended in the center of the ...
Other editions - View all
Common terms and phrases
acid aerosol alloy aluminum analysis analytical anode atomic atomic weight building Bureau of Standards calculated calibration calorimeter cell Chem chemical chromospheric Conf constant coulometer croconate cryogenic crystal density detector determined developed discussed dosimetry effects electrical electron energy enthalpy of solution equation error evaluation experimental factors Faraday constant figure fire incident frequency function heat hydrogen ionization isotopic J. L. Bryan Key words laboratory laser linear magnetic malononitrile mass materials measurements ment method molal molecular National Bureau NBSIR neutron observed obtained optical Order from NTIS paper parameters particle percent performance Phys physical polymer potentiostat pressure Proc procedure Publ radiation range ratio reaction sample scattering silicon smoke detectors solar Spec spectra spectroscopy structure superconducting surface suspended coil techniques Technology temperature thallium thermal tion uncertainty values voltage weight x-ray
Popular passages
Page 425 - Building Science Series — Disseminates technical information developed at the Bureau on building materials, components, systems, and whole structures. The series presents research results, test methods, and performance criteria related to the structural and environmental functions and the durability and safety characteristics of building elements and systems.
Page 509 - Provides quantitative data on the physical and chemical properties of materials, compiled from the world's literature and critically evaluated.
Page 232 - At the Institute for Computer Sciences and Technology of the national Bureau of Standards...
Page 509 - Studies or reports which are complete in themselves but restrictive in their treatment of a subject. Analogous to monographs but not so comprehensive in scope or definitive in treatment of the subject area. Often serve as a vehicle for final reports of work performed at NBS under the sponsorship of other government agencies.
Page 425 - A special series of interim or final reports on work performed by NBS for outside sponsors (both government and non-government). In general, initial distribution is handled by the sponsor; public distribution is by the National Technical Information Services (Springfield, Va. 22161) in paper copy or microfiche form.
Page 71 - ... materials needed by industry, commerce, educational institutions, and Government; provides advisory and research services to other Government Agencies...
Page 71 - NIST pursuant to the Federal Property and Administrative Services Act of 1949 as amended, Public Law 89-306 (79 Stat. 1127), and as implemented by Executive Order 11717 (38 FR 12315, dated May 11, 1973) and Part 6 of Title 15 CFR (Code of Federal Regulations).