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Journals

Ideal Gases in Time-Dependent Traps

June 1, 2000

Author(s)

G M. Bruun, Charles W. Clark

We investigate theoretically the properties of an ideal trapped gas in a time-dependent harmonic potential. Using a scaling formalism, we are able to present

Interacting Atoms Under Strong Quantum Confinement

June 1, 2000

Author(s)

Eite Tiesinga, Carl J. Williams, F H. Mies, Paul S. Julienne

We calculate the energy level shifts of a tightly-confined trapped alkali atom in the presence of a second trapped atom. A complete microscopic description of

High-Resolution Infrared Spectrum of the Ring-Puckering Band, Ņ₁₀ of Diborane

June 1, 2000

Author(s)

Walter J. Lafferty, J.- M. Flaud, R L. Sams, Thomas A. Blake, S W. Sharpe

The spectrum of the Ņ 10 band of diborane, arising from the ring puckering vibration, has been obtained with a spectral resolution of 0.0015 cm -1 in the region

The Approaching Revolution in X-Ray Microanalysis: The Microcalorimeter Energy Dispersive Spectrometer

June 1, 2000

Author(s)

Dale E. Newbury, David A. Wollman, Gene C. Hilton, Kent D. Irwin, Norman F. Bergren, David A. Rudman, John M. Martinis

We have developed a high-resolution energy-dispersive x-ray spectrometer (EDS) based on cryogenic microcalorimeter x-ray detectors for use in x-ray

Evolution and Multidisciplinary Frontiers of C-14 Aerosol Science

June 1, 2000

Author(s)

Lloyd A. Currie

A review is given of some critical events in the development of radiocarbon aerosol science, and the profound influence of radiocarbon accelerator mass

Is a Production Level Scanning Electron Microscope Linewidth Standard Possible?

June 1, 2000

Author(s)

Michael T. Postek, Andras Vladar, John S. Villarrubia

Metrology will remain a pricipal enabler for the development and manufacture of future generations of semiconductor devices. With the potential of 130 nm and

Smart Pyrometry for Combined Sample Temperature and Reflectance Measurements in Molecular-Beam Epitaxy

June 1, 2000

Author(s)

Kristine A. Bertness

We have fabricated spin-valve devices in a high-speed test structure that allows subnanosecond pulsed field excitation and high-bandwidth observation of the

Narrow photoluminescence linewidths from ensembles of self-assembled InGaAs quantum dots

June 1, 2000

Author(s)

Richard P. Mirin, Kevin L. Silverman, David H. Christensen, Alexana Roshko

Self-assembled InGaAs quantum dots have been grown using alternating molecular beams of In, Ga, and As 2. The size distribution changes from bimodal to

Superconductor Measurement Techniques and Cryostat Design

June 1, 2000

Author(s)

John (Jack) W. Ekin

This introduction to measurement cryostat design includes illustrations of several practical cryostats for testing low-current thin-films and high-current bulk

The Effect of an Oxidized Gold Substrate on Alkanethiol Self-Assembly

June 1, 2000

Author(s)

John T. Woodward IV, Marlon L. Walker, Curtis W. Meuse, David J. Vanderah, G Poirier, Anne L. Plant

UV cleaned gold substrates incubated in solutions of alkanethiol show islands on the monolayer surface when imaged with non-contact atomic force microscopy (AFM

Role of Microstructure in Dynamic Fatigue of Glass-Ceramics After Contact with Spheres

June 1, 2000

Author(s)

J G. Yeo, K -. Lee, Brian R. Lawn

Dynamic fatigue data are reported for fine- and coarse-grain micaceous glass-ceramics after contact damage with spheres. Strengths of indented specimens are

Chemistry of NO₂ on CeO₂ and MgO: Experimental and Theorectical Studies on the Formation of NO₃

June 1, 2000

Author(s)

J A. Rodriguez, T Jirsak, S Sambasivan, Daniel A. Fischer, A Maiti

In environmental catalysis the destruction or removal of nitrogen oxides (DeNOx process) is receiving a lot of attention. Synchrotron-based x-ray absorption

Multilevel Structure of Reinforcing Silica and Carbon

June 1, 2000

Author(s)

D W. Schaefer, T Rieker, M M. Agamalian, J S. Lin, Daniel A. Fischer, S Sukumaran, C I. Chen, G Beaucage, C Herd, J Ivie

We study the structure of colloidal silica and carbon on length scales from 0.25 -1 7 using x-ray, neutron and light scattering. These materials consist of

Microwave Detection of Stress-Induced Fatigue Cracks in Steel and Potential for Crack Opening Determination

June 1, 2000

Author(s)

N Qaddoumi, E Ranu, Joseph D. McColskey, R Mirshahi, R Zoughi

Fatigue crack detection in metals is an important practical issure in many industries. In this paper the results of an investigation, using the dominat mode

E-Glass/DGEBA/m-PDA Single Fiber Composites: The Effect of Strain Rate on Interfacial Shear Strength Measurements

June 1, 2000

Author(s)

Gale A. Holmes, R C. Peterson, Donald L. Hunston, Walter G. McDonough

In this paper, precise measurements of fiber break regions formed during the single fiber fragmentation testing procedure have been made for E-glass/diglycidyl

High-Resolution Frequency Standard at 1030 nm for Yb : YAG Solid State Lasers

June 1, 2000

Author(s)

J Ye, L -. Ma, John L. Hall

A diode-pumped solid-state Yb:YAG laser has been stabilized to a high-finesse cavity with an all-external serve loop. Ultrasensitive cavity-enhanced frequency

Bose Condensates in a Harmonic Trap Near the Critical Temperature

June 1, 2000

Author(s)

T Bergeman, D L. Feder, N L. Balazs, B I. Schneider

The mean-field properties of finite-temperature Bose-Einstein gases confined in spherically symmetric harmonic traps are surveyed numerically. The solutions of

Elastic Scattering Loss of Atoms from Colliding Bose-Einstein Condensate Wave Packets

June 1, 2000

Author(s)

Y B. Band, M Trippenbach, J P. Burke, Paul S. Julienne

Bragg diffraction of atoms by light waves has been used to create high momentum components in a Bose-Einstein condensate. Collisions between atoms from two

Valence-Shell Autoionization of NO

June 1, 2000

Author(s)

S H. Southworth, T A. Ferrett, Jonathan E. Hardis, Albert C. Parr, J L. Dehmer

Autoionization of valence and Rydberg states in NO over the 12.5-18 eV photon energy range was studied by vibrationally resolved photoelectron spectroscopy of

Effects of Electron-Hole Interaction on the Dynamic Structure Factor: Application to Nonresonant Inelastic X-ray Scattering

June 1, 2000

Author(s)

J A. Soininen, Eric L. Shirley

We present a first-principles scheme for calculating the dynamic structure factor and inelastic x-ray scattering double-differential cross section for the

Interferometric Measurement of Resonance Transition Wavelengths in CIV, SiIV, AlIII, Al II, and SiII

June 1, 2000

Author(s)

Ulf Griesmann, R Kling

The wavelength of the important ultraviolet diagnostic lines in the spectra C IV near 155 nm and Si IV near 139 nm were measured with a vacuum ultraviolet

Laser Probing of Rotational-State-Dependent Velocity Distributions of N⁺₂ (Ņ= O,J) Drifted in He

June 1, 2000

Author(s)

E B. Anthony, V M. Basitan, V M. Bierbaum, S R. Leone

rotational state-resolved velocity component distribution functions of N + 2 (nu=O) drifted in helium are measured in a flow-drift apparatus by the technique of

Direct Measurements of Rate Coefficients for the Reaction of Ethynyl Radical (C₂H) With C₂H₂ at 90 and 120 K Using a Pulsed Laval Apparatus

June 1, 2000

Author(s)

S Lee, D A. Samuels, R J. Hoobler, S R. Leone

Rate coefficients for the reaction C 2H + C 2H 2 -> C 4H 2 + H are measured at 90 and 120 K by using a new pulsed Laval nozzle apparatus equipped with laser

Phase-Tailoring Molecular Wave Packets to Time-Shift Their Dynamics

June 1, 2000

Author(s)

Z Amitay, J B. Ballard, H U. Stauffer, S R. Leone

Time-shifting (up to a global arbitrary phase) of the dynamics of molecular wave packets, i.e., |dielectric flux}(t)> -> | dielectric flux} (t-t shift)>, is

Reliability of Ultra-Thin Silicon Dioxide Under Combined Substrate Hot Electron and Constant Voltage Tunneling Stress

June 1, 2000

Author(s)

Eric M. Vogel, John S. Suehle, Bin Wang, Y Chen, J B. Bernstein

An experimental investigation of breakdown and defect generation under combined substrate hot electron and tunneling electrical stress of silicon oxide ranging

Dynamic Input Capacitance of Single-Electron Transistors and the Effect on Charge-Sensitive Electrometers

June 1, 2000

Author(s)

Neil M. Zimmerman, Mark W. Keller

The 1.30 Angstrom Resolution Structure of Bascillus Subtillis Chorismate Mutase Catalytic Homotrimer

June 1, 2000

Author(s)

Jane E. Ladner, Prasad T. Reddy, A M. Davis, M Tordova, A Howard, G L. Gilliland

The crystal structure of the Bacillus subtilis chorismate mutase, an enzyme of the aromatic amino acids biosynthetic pathway, was determined to 1.30- resolution

Equivalent Boundary Conditions for a Perfectly Conducting Periodic Surface with a Cover Layer

June 1, 2000

Author(s)

Christopher L. Holloway, Edward Kuester

Determination of non-ortho Polychlorinated Biphenyls in Environmental Standard Reference Materials

June 1, 2000

Author(s)

W. W. Brubaker, Michele M. Schantz, Stephen Wise

Photon-Assisted Tunneling in Electron Pumps

May 29, 2000

Author(s)

M. Covington, Mark W. Keller, Richard L. Kautz, John M. Martinis

We measure photon-assisted tunneling in 4- and 6-junction electron pumps at photon frequencies up to 60 GHz. We determine the microwave voltage at the pumps

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