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Displaying 41376 - 41400 of 74404

Report of Experimental Results for Tests 2,3, and 4 of the International Fire Model Benchmarking and Validation Exercise #3

July 1, 2003
Author(s)
Anthony P. Hamins, Michelle K. Donnelly, Erik L. Johnsson, Alexander Maranghides, George W. Mulholland
As part of its Fire Risk Research Program, the NRC (Nuclear Regulatory Commission) and NIST (National Institute of Standards and Technology) are participating in an International Collaborative Fire Model Project (ICFMP) to assess and validate fire computer

Resonant Soft X-Ray Photofragmentation of Propane

July 1, 2003
Author(s)
William E. Wallace, Daniel A. Fischer
A comparison was made between the mass spectra of propane (CH6d3^CH 2CH 3) for resonant soft X-ray photofragmentation and electron-impact ionization. The soft X-ray photon energy was tuned to 287.7 eV to promote Auger relaxations from the C-H bonds (1s _>

Rotational Spectroscopy of Vibrationally Excited States by Infrared-Fourier Transform Microwave-Microwave Triple-Resonance Spectroscopy

July 1, 2003
Author(s)
K O. Douglass, J C. Keske, F S. Rees, K Welch, H S. Yoo, Brooks H. Pate, I Leonov, R D. Suenram
A Fourier transform microwave (FTMW) spectroscopy technique for measuring the rotational spectra of vibrational excited states is demonstrated. A pulsed infrared laser is used to prepare the excited state outside the FTMW cavity. Following laser excitation

Semiconductor Microelectronics and Nanoelectronics Programs

July 1, 2003
Author(s)
Stephen Knight, Joaquin (. Martinez, Michele L. Buckley
The microelectronics industry supplies vital components to the electronics industry and to the U.S. economy, enabling rapid imporvements in productivity and in new high technology growth industries such as electronic commerce and biotechnology. The

Structural, Electronic, and Magnetic Properties of Heterofullerene C 48 B 12

July 1, 2003
Author(s)
Rui-Hua Xie, L Jensen, Garnett W. Bryant, J Zhao, V H. Smith
Bonding, electric (hyper) polarizability; vibrational and magnetic properties of heterofullerene C 48B 12 are studied by first-principles calculations. Infrared- and Raman-active vibrational frequencies of C 48B 12 are assigned. Eight 13C and two 11B

Studies of Fingerprint Matching Using the NIST Verification Test Bed (VTB)

July 1, 2003
Author(s)
Charles L. Wilson, Craig I. Watson, Michael D. Garris, R. A. Hicklin
A series of fingerprint matching studies have been conducted on an experimental laboratory system called the Verification Test Bed (VTB). The VTB is a collection of commercial off the shelf (COTS) computer hardware, an open-source operating system, and a

Terahertz Spectroscopy of Short-Chain Polypeptides

July 1, 2003
Author(s)
M R. Kutteruf, Craig Brown, L K. Iwaki, M B. Campbell, Timothy M. Korter, Edwin J. Heilweil
Terahertz (THz) absorption and neutron vibrational spectra for solid-phase short-chain peptide sequences at 77 K and 298 K are reported. We demonstrate that a high degree of spectral and structural information exists for these systems in the 1 THz to 15

The Detection and Sizing of Flaws in Components From the Hot-End of Gas Turbines Using Phase Contrast Radiography: A Feasibility Study

July 1, 2003
Author(s)
J Thornton, P J. McMahon, B E. Allman, J E. Murphy, K A. Nugent, David L. Jacobson, Muhammad D. Arif, S. A. Werner
In this paper we present a feasibility study of the use of phase contrast radiography in the examination of components from the hot-section of gas turbine engines. These components are usually made from dense materials (nickel or cobalt based superalloys)

The Expanding NIST Atomic Spectra Database

July 1, 2003
Author(s)
Wolfgang L. Wiese
The NIST Atomic Spectra Database is reviewed, and the additions planned for the near-term and longer range future are discussed. Two examples are presented, illustrating the often still unsatisfactory state of transition probability data, which show the

Theory of the Greenspan Viscometer

July 1, 2003
Author(s)
Keith A. Gillis, J B. Mehl, Michael R. Moldover
We present a detailed acoustic model of the Greenspan acoustic viscometer, a practical instrument for accurately measuring the viscosity eta of gases. As conceived by Greenspan, the viscometer is a Helmholtz resonator composed of two chambers coupled by a

Toward Traceability for At-line AFM Dimensional Metrology

July 1, 2003
Author(s)
Marylyn H. Bennett, Angela Guerry, Ronald G. Dixson, Michael T. Postek, Theodore V. Vorburger
The in-line and at-line measurement tools for critical dimension (CD) metrology in semiconductor manufacturing are technologically advanced instruments that exhibit excellent measurement repeatability - below one nanometer in some cases. Accuracy, however

Towards High Accuracy Reflectometry for Extreme-Ultraviolet Lithography

July 1, 2003
Author(s)
Charles S. Tarrio, S Grantham, M B. Squires, Robert E. Vest, Thomas B. Lucatorto
Currently the most demanding application of extreme ultraviolet optics is connected with the development of extreme ultraviolet lithography. Not only does each of the Mo/Si multilayer EUV stepper mirrors require the highest attainable reflectivity at 13 nm

Two-Color Photoassociation Spectroscopy of the Lowest Triplet Potential of Na 2

July 1, 2003
Author(s)
L E. de Araujo, J D. Weinstein, S D. Gensemer, F K. Fatemi, Kevin Jones, Paul D. Lett, Eite Tiesinga
We have performed a type of Autler-Townes spectroscopy to locate a number of rovibrational hyperfine levels of the a ^3^ς + u potential, the lowest triplet potential of the Na 2 dimer. The spectroscopy starts with the photoassociation of ultracold atoms in
Displaying 41376 - 41400 of 74404
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