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Displaying records 81 to 90 of 215 records.
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81. Spherical Reference Cavities for Ultra-Stable Lasers in Non-Laboratory Environments
Topic: Physics
Published: 2/14/2011
Authors: David R Leibrandt, Michael J. (Michael) Thorpe, Mark Notcutt, Robert E. Drullinger, Till P Rosenband, James C Bergquist
Abstract: We present an ultra-stable optical cavity design that is insensitive to both vibrations and orientation. The design is based on a spherical cavity spacer which is held rigidly at two points on a diameter of the sphere. Coupling of the support force ...

82. The Infrared Spectra of C2H4+ and C2H3 Trapped in Solid Neon
Topic: Physics
Published: 2/14/2011
Authors: Marilyn E Jacox, Warren Elwin Thompson
Abstract: When a mixture of ethylene in a large excess of neon is codeposited at 4.3 K with a beam of neon atoms that have been excited in a microwave discharge, two groups of product absorptions appear in the infrared spectrum of the deposit. Similar studies ...

83. Use of Phosphor Image Plates for Measuring Intensities in Vacuum Ultraviolet Spectra
Topic: Physics
Published: 1/28/2011
Authors: Gillian Nave, Craig J Sansonetti, Csilla Szabo, John J Curry, Darren Smillie
Abstract: We describe the use of phosphor image plates for recording spectra in the vacuum ultraviolet (VUV) and for determining accurate relative and absolute intensities. We investigated the spatial uniformity, noise level, linearity of the response to VUV ...

84. Quantum information processing and metrology with trapped ions
Topic: Physics
Published: 1/25/2011
Authors: David J Wineland, Dietrich G Leibfried
Abstract: The use of trapped atomic ions in the field of quantum information processing is briefly reviewed. We summarize the basic mechanisms required for logic gates and the use of the gates in demonstrating simple algorithms. We discuss the potential of tra ...

85. NIST Time and Frequency Bulletin
Series: NIST Interagency/Internal Report (NISTIR)
Topic: Physics
Published: 1/5/2011
Author: Petrina C Potts
Abstract: The Time and Frequency Bulletin provides informaiton on performance of time scales and a variety of broadcasts (and related information) to users of the NIST services.

86. Femtotesla atomic magnetometry in a microfabricated vapor cell
Topic: Physics
Published: 12/20/2010
Authors: William C. Griffith, Svenja A Knappe, John E Kitching
Abstract: We describe an optically pumped ^u87^Rb magnetometer with 4.5 fT/Hz^u1/2^ sensitivity when operated in the spin-exchange relaxation free (SERF) regime. The magnetometer uses a microfabricated vapor cell, consisting of a cavity etched in a 1 mm thick ...

87. Progress at NIST in measuring the D-lines of Li isotopes using an optical frequency comb
Topic: Physics
Published: 12/20/2010
Authors: Clayton Simien, Samuel Middleton Brewer, Joseph N Tan, John D Gillaspy, Craig J Sansonetti
Abstract: Precise spectroscopic experiments with light atoms can provide information about nuclear properties that are very difficult to obtain in electron scattering experiments. For example, relative nuclear radii of low-Z isotopes can be determined accurat ...

88. Polarized neutron beam properties for measuring parity-violating spin rotation in liquid He4
Topic: Physics
Published: 12/14/2010
Authors: A M. Micherdzinska, C. D. Bass, T. D. Bass, K. F. Gan, D Lou, D M Markoff, Hans P Mumm, Jeffrey S Nico, A. K. Opper, E I Sharapov, M Snow, H E Swanson, V Zhumabekova
Abstract: Measurements of parity-violating neutron spin rotation can provide insight into the poorly nderstood nucleon-nucleon weak interaction. Because the expected rotation angle per unit length is small (10−7 rad/m), several properties of the polarize ...

89. Band Alignment of Metal-Oxide-Semiconductor Structure by Internal Photoemission Spectroscopy and Spectroscopic Ellipsometry
Topic: Physics
Published: 12/10/2010
Authors: Nhan V Nguyen, Oleg A Kirillov, John S Suehle
Abstract: In this paper, we will provide an overview of the internal photoemission (IPE) and the significance of this technique when combined with spectroscopic ellipsometry (SE) to investigate the interfacial electronic properties of heterostructures. In ...

90. A NIST Disciplined Oscillator: Delivering UTC(NIST) to the Calibration Laboratory
Topic: Physics
Published: 12/1/2010
Author: Michael A Lombardi
Abstract: The National Institute of Standards and Technology (NIST) now offers a service that provides customers with an oscillator locked to UTC(NIST), the United States national standard for frequency and time. A NIST disciplined oscillator (NISTDO) works b ...

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