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Displaying records 91 to 100 of 215 records.
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91. Wavelengths, Transition Probabilities, and Energy Levels for the Spectra of Barium (Ba III through Ba LVI)
Topic: Physics
Published: 11/19/2010
Authors: Jean Ellen Sansonetti, John J Curry
Abstract: Energy levels, with designations and uncertainties, have been compiled for the spectra of barium (Z=56) ions from doubly-ionized to hydrogen-like. Wavelengths with classifications, intensities, and transition probabilities are also tabulated. In addi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904125

92. Evaluation of a GPS Receiver for Code and Carrier-Phase Time and frequency Transfer
Topic: Physics
Published: 11/15/2010
Authors: Victor Shufang Zhang, Michael A Lombardi
Abstract: We evaluate a dual-frequency, multi-channel GPS receiver for time and frequency transfer applications. The receiver is able to lock its internal clock to an external reference frequency and synchronize the receiver clock to an external timing signal. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907335

93. On-Board GPS Clock Monitoring for Signal Integrity
Topic: Physics
Published: 11/15/2010
Authors: Marc Abbott Weiss, Pradipta Shome, Ron Beard
Abstract: Navigation signal integrity is paramount for aviation and safety of life services. Hitherto GPS signal anomaly alerting has been provided primarily by ground based augmentations. Significantly improved navigation signal integrity and quality may be ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907478

94. Decoherence due to elastic Rayleigh scattering
Topic: Physics
Published: 11/12/2010
Authors: Hermann Uys, Michael J. Biercuk, Aaron Vandevender, Christian Ospelkaus, Dominic Meiser, R. Ozeri, John J Bollinger
Abstract: We present theoretical and experimental studies of the decoherence of hyperfine ground-state superpositions due to elastic Rayleigh scattering of off-resonant light. We demonstrate that under appropriate conditions, elastic Rayleigh scattering can b ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906081

95. A Microwave Study of Hydrogen-Transfer-Triggered Methyl-Group Rotation in 5-Methyltropolone
Topic: Physics
Published: 11/10/2010
Authors: Vadim V. Ilyushin, Emily A. Cloessner, Yung-Ching Chou, Laura B. Picraux, Jon Torger Hougen, Richard Lavrich
Abstract: We present here the first experimental and theoretical study of the microwave spectrum of 5-methyltropolone, which can be visualized as a 7-membered aromatic carbon ring with a five-membered hydrogen-bonded cyclic structure at the top and a methyl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903562

96. Effect of metal/substrate interfaces on radio-frequency loss in superconducting coplanar waveguides
Topic: Physics
Published: 11/8/2010
Authors: David S. Wisbey, Jiansong Gao, Fabio Cesar Da Silva, Jeffrey S. Kline, Michael Robert Vissers, David P Pappas, Leila R Vale
Abstract: Microscopic two-level systems (TLSs) are known to contribute to loss in resonant superconducting microwave circuits. This loss increases at low power and temperatures as the TLSs become unsaturated. We find that the loss is dependent on both the subs ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905371

97. Nuclear Magnetic Resonance Gyroscopes
Topic: Physics
Published: 11/2/2010
Author: Elizabeth A Donley
Abstract: Nuclear magnetic resonance gyroscopes(NMRGs)detect rotation as shift in the Larmor precession frequency of nuclear spins. A review of the open literature on NMRGs is presented, which includes an introduction to the spectroscopic techniques that enabl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906267

98. SIM time scales
Topic: Physics
Published: 10/27/2010
Authors: Michael A Lombardi, J. Mauricio Lopez-Romero, Nelida Diaz-Munoz
Abstract: This paper presents an analysis of the performance of some of the time scales generated in the Sistema Interamericano de Metrologia (SIM) region. We emphasize the generation of the first international time scale in near real time, the SIM Time scale ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906268

99. The evolving optical frequency comb
Topic: Physics
Published: 10/22/2010
Author: Scott A Diddams
Abstract: Much as natural historians search for the first roots of our human race, curiosity drives the laser scientist to pursue the roots of his or her own field. This is especially the case in this year where our community celebrates the 50th anniversary o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906176

100. Characterization of a Soluble Anthradithiophene Derivative
Topic: Physics
Published: 10/1/2010
Authors: Brad Conrad, Calvin Chan, Marsha A. Loth, Sean R Parkin, Xinran Zhang, John E Anthony, David J Gundlach
Abstract: The structural and electrical properties of a new solution processable material, 2,8-diflouro-5,11-tert-butyldimethylsilylethynl anthradithiophene (TBDMS), were measured for single crystal and spun cast thin-film transistors. TBDMS is observed to rea ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905704



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