CONTENTdm Title

Donald Burgess with SENKPLOT interactive graphics software package
Photographs; History; Metrology; Computer software
SENKPLOT interactive graphics software package is a tool for rapid analysis of chemical kinetic numerical simulations.
Historic Images

Oral history interviews of Allen V. Astin, September 22, 1981 and July 12, 1983
Astin, Allen
Sept. 22, 1981 - Allen Astin discusses his 37 year career at NBS. He talks about his work in dielectrics and electronic instrumentation, his proximity fuze work with Lawrence Taylor and radiosonde work with his competitor Harry Diamond. Astin...
NBS-NIST Oral Histories

Portrait of Arden L. Bement Jr.
Photographs; History; Metrology
Served as director of the National Institute of Standards and Technology from 2001 through 2004.
NBS-NIST Employees - Historic

Portrait of Arden Bement
Photographs; History; Metrology
Served as director of the National Institute of Standards and Technology from 2001 through 2004.
NBS-NIST Employees - Historic

Revised standard values for pH measurements from 0 to 95 °C
activity scale; Bates; emf data; Guggenheim
Seven standard solutions serve to fix the NBS conventional activity scale of pH (termed pHs) from 0 to 95 °C. The original emf data have been re-examined and the values of the acidity function [formula not included], from which pHs is derived, have...
Journal of Research of NIST and Predecessor Publications

Correction factors for the calibration of encapsulated radium sources
absorption; calibration; encapsulated; radium
Several aspects of the procedure and corrections for the calibration of encapsulated radium sources at NBS have recently been investigated. It was found that a chamber equipped with a guard-ring type electrode system allowing the use of a vibrating...
Journal of Research of NIST and Predecessor Publications

On Kirchhoff's law and its generalized application to absorption and emission by cavities
Cavities; Kirchow's law; spectral absorption; spectral emittance
Several authurs have made the assumption that Kirchhoff's Law holds for the apparent local spectral emittance and apparent local spectral absorptance of any point on the interior surface of a cavity. The correctness of this assumption is...
Journal of Research of NIST and Predecessor Publications

On spaces and maps of generalized inverses
Generalized inverse; linear algebra; matrix
Several classes of generalized inverses of a given mxn matrix are considered. A collection of continuous maps is given, each of which maps a class of generalized inverses onto a stronger class and the elements of the stronger class are the fixed...
Journal of Research of NIST and Predecessor Publications

Gamma irradiation of fluorocarbon polymers
Gamma irradiation; fluorocarbon polymers; mechanism; radiation-induced changes
Several fluorocarbon polymers were irradiated with Co-60 gamma radiation at doses up to 10-22 ev/g. The polymers studied included polytetrafluoroethylene, polytrifluoroethylene, polichlorotrifluoroethylene, a copolymer of tetrafluoroethylene with...
Journal of Research of NIST and Predecessor Publications

Recommendations for Improving Consistency in the Radiation Fields Used During Testing of Radiation Detection Instruments for Homeland Security Applications
ANSI/IEEE standards testing; exposure rate constants; radiation field determination; source activity.
Several measurements and calculations were performed to illustrate the differences that can be observed in the determination of exposure rate or ambient dose equivalent rate used for testing radiation detection systems against consensus standards....
Journal of Research of NIST and Predecessor Publications

Medals from William F. Meggers
Several medals given to National Bureau of Standards physicist William F. Meggers. (Paired images shown display the obverse and reverse of the same medal.)
NIST Museum Artifacts

Medals from William F. Meggers
Several medals given to National Bureau of Standards physicist William F. Meggers. (Paired images shown display the obverse and reverse of the same medal.)
NIST Museum Artifacts

New absorption bands and isotopic studies of known transitions in CO
Absorption spectrum; CO; electronic transitions; rotational analysis; vibrational analysis; vibrational and rotational constants
Several new absorption bands of the a' 3S+ - X1S+ and e 3S- - X1S+ transitions in CO have been observed and analyzed. Vibrational levels of both the a' 3S+ and e 3S- states are now known to within 0.4 eV of their dissociation limits. Isotopic bands...
Journal of Research of NIST and Predecessor Publications

Notes on automorphic functions: an entire automorphic form of positive dimension is zero
Automorphic forms; discontinuous groups; Fourier expansion; H-groups
Several new proofs are given of the fact that an entire automorphic form of positive dimension is zero. The first proof is modeled on the method used by Hecke to estimate the Fourier coefficients of cusp forms of nega tive dimension. The other...
Journal of Research of NIST and Predecessor Publications

Contamination in the rare-earth element orthophosphate reference samples
EPMA; microanalysis; orthophosphates; quantitative analysis; rare earth elements; rare earth phosphates; REE; standards
Several of the fourteen rare-earth element (plus Sc and Y) orthophosphate standards grown at Oak Ridge National Laboratory in the 1980s and widely distributed by the Smithsonian Institution's Department of Mineral Sciences, are significantly...
Journal of Research of NIST and Predecessor Publications

Methods of measuring the resistivities of anisotropic conducting media in situ
anisotropic media, chords, electrodes, conductivity, resistivity, slab
Several static boundary value problems involving anisotropic media have been solved and the results are presented here. The solutions have been applied to simple electrode configurations to obtain formulas for in situ determinations of the...
Journal of Research of NIST and Predecessor Publications

Investigations of the systematics of crystal packing using the Cambridge Structural Database
Cambridge Structural Database; crystal packing; molecular crystals
Several studies that used the Cambridge Structural Database to elucidate principles of packing in molecular crystals are described. Some possible sources of bias in the statistical distributions are discussed.
Journal of Research of NIST and Predecessor Publications

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