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You searched on: Author: zeina kubarych Sorted by: date

Displaying records 11 to 20 of 30 records.
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11. Magnetic Levitation System for the Dissemination of a Non-Artifact Based Kilogram
Published: 11/27/2007
Authors: Zeina Jabbour Kubarych, Patrick J Abbott, Edwin Ross Williams, Ruimin Liu, Vincent J Lee
Abstract: We describe a new approach to directly link air and vacuum mass measurements. This approach uses magnetic levitation along with vacuum and balance technology to realize vacuum mass measurements. It provides direct traceability to the International Pr ...

12. Final Report on CIPM Key Comparison of 1 kg Standards in Stainless Steel (CCM.M-K1)
Published: 10/1/2004
Authors: R S Davis, C Aupetit, L O Becerra, W Bich, N Bignell, G D Chapman, J.-H. Chung, J Coarasa, Stuart Davidson, N G Domostroeva, Kitty Fen, M Glaser, W G Lee, M Lecollinet, Q Li, R Spurny, J Verbeek, Zeina Jabbour Kubarych, A Ooiwa, A Torino
Abstract: This report describes a Key Comparison of 1 kg standards in stainless steel undertaken by the Consultative Committee on Mass and Related Quantities (CCM) and piloted by the Bureau International des Poids et Mesures (BIPM). The comparisons were carri ...

13. Effects of Cleaning on the US Prototype Kilograms
Published: 1/1/2001
Authors: Zeina Jabbour Kubarych, R S Davis
Abstract: This paper dicusses the stability of national prototype kilograms No. 4 and No. 20, belonging to the United States. Calibration history, changes in mass with respect to time, and effects on mass and surface profiles due to cleaning and washing are d ...

14. The Kilogram and Measurements of Mass and Force
Published: 1/1/2001
Authors: Zeina Jabbour Kubarych, Simone L Yaniv
Abstract: This paper describes the facilities, measurement capabilities, and ongoing research activities in the areas of Mass and Force at the National Institute of Standards and Technology (NIST). The first section of the paper is devoted to mass metrology a ...

15. Status of Mass Metrology at NIST in 2000
Published: 1/1/2000
Author: Zeina Jabbour Kubarych
Abstract: This paper summarizes the activities in mass metrology at NIST. It includes a description of the facilities and the procedures used in the dissemination of the mass unit. This paper also discusses the research efforts to understand and characterize ...

16. The Kilogram: Last remaining artifact
Published: 4/1/1999
Author: Zeina Jabbour Kubarych
Abstract: The unit of mass, the kilogram, is the last remaining basic unit defined by an artifact. Worldwide efforts are underway to replace the artifact-based definition with invariant alternatives. This paper describes briefly the history of the kilogram, th ...

17. Experimental Study of the NaK (3 1PI) State
Published: 2/1/1999
Authors: E Laub, J Huennekens, R K Namiotka, Zeina Jabbour Kubarych, I Prodan, J La civita, S Webb, I Mazsa
Abstract: We report the results of an optical-optical double resonance experiment to determine the NaK (3 1PI) state potential energy curve. In the first step, a narrow band cw laser (PUMP) is tuned to line center of a particular 2(A) (1 SIGMA+)(v?, J?) <-- 1 ...

18. A Study of the predissociation of NaK molecules in the (6 1sigma+) state by optical-optical double resonance spectroscopy
Published: 7/6/1997
Authors: Zeina Jabbour Kubarych, J Huennekens
Abstract: Predissociation of a high-lying /sup 1/ Sigma /sup +/ state of NaK is studied using the optical-optical double resonance technique. A single-mode ring dye laser is set to a particular 2(A)/sup 1/ Sigma /sup +/( nu ', J') from 1(X)/sup 1/ Sigma /sup + ...

19. Experimental Study of Caesium 6PJ+ 6PJ -->7PJ? + 6S energy pooling collisions and modeling of the excited atom density in the presence of optical pumping and radiation trapping
Published: 7/5/1997
Authors: F d Tomasi, J Huennekens, Zeina Jabbour Kubarych, A Allegrini, A Fioretti, P Verker, S Milosevic
Abstract: An experimental study of caesium energy pooling collisions at thermal energies, has been carried out in a capillary cell using diode laser excitation. Use of the capillary cell minimizes the effects of radiation trapping, but nonetheless, such effect ...

20. Mass Metrology at NIST
Published: 4/23/1997
Author: Zeina Jabbour Kubarych
Abstract: The mission of the mass group of the Automated Production Technology Division at NIST is to maintain the mass unit, disseminate it to U.S. industry, government, and academia, and provide traceability to the International Prototype Kilogram. Efforts ...

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