An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
The purpose of this study was to evaluate a reactive fluorescent probe, 9,10-Bis-(phenylethynyl) anthracene (BPEA), for cure monitoring of hydrosilation-curable...
M A. Sahiner, D F. Downey, S W. Novak, Joseph Woicik, D A. Arena
Characterization of the inactive clusters formed by high dose implantation silicon is one of the crucial topics in the semiconductor industry. Analytical...
The synthesis of optical frequencies from the primary cesium microwave standard has traditionally been a difficult problem due to the large difference in...
L -. Ma, R K. Shelton, H C. Kapteyn, M M. Murnane, Jun Ye
Two independent mode-locked femtosecond lasers are synchronized to an unprecedented precision. The remaining rms timing jitter betweenthe lasers is 4.3 fs...
The spectrum of neodymium excited by a sliding spark source was photographed on two vacuum ultraviolet normal-incidence spectrographs. About 250 lines...
M H. Anderson, J R. Ensher, M R. Matthews, C E. Wieman, Eric A. Cornell
We have produced a Bose-Einstein condensate in a vapor of rubidium-87 atoms confined by magnetic fields and evaporatively cooled. The condensate fraction first...
E Potma, Christopher J. Evans, X. Xie, R. J. Jones, Jun Ye
We experimentally demonstrate the amplification of picosecond pulses at high repetition rates through coherent addition of successive pulses of a mode-locked...
D J. Jones, K W. Holman, M Notcutt, Jun Ye, J Chandalia, L A. Jiang, Erich P. Ippen, H Yokoyama
Using high-badwidth feedback, we ahve synchronized the pulse train from a mode-locked semiconductor laser (MLLD) to an external clock signal and achieved the...
I Savukov, W R. Johnson, U I. Safronova, M S. Safronova
Energies, transition rates, and electron electric dipole moment (EDM) enhancement factors are calculated for low-lying states of Ce IV and Pr V using...
Freestyle swimming competition is extremely fierce, as the winner of a 50- or 100- meter sprint often beats the second place swimmer by amargin of less than one...
We describe the design and first results of a cam-driven portable absolute gravinieter. The cam-based design of a dropper allows us to builda compact system...
T M. Fortier, D J. Jones, Jun Ye, Steven T. Cundiff
We report on stabilizing the carrier-envelope phase of modelocked Ti:sapphire lasers. Optimization of the construction of the lasers for ease of phase...
C R. Proffitt, T Brage, D S. Leckrone, G Wahlgren, J C. Brandt, Craig J. Sansonetti, Joseph Reader, S Johansson
Observations of mercury lines in the HgMn stars chi Lupi and HR 7775 made with the Hubble Space Telescope's Goddard High Resolution Spectrograph are presented...
J A. Carlisle, Steven R. Blankenship, R N. Smith, Eric L. Shirley, L J. Terminello, J J. Jia, T A. Callcott, D L. Ederer
Resonant inelastic x-ray scattering (RIXS) has been observed in many systems above and below their core threshold. Below threshold, inelastic-loss features are...
J G. Diaz, M Zielinski, W Jaskolski, Garnett W. Bryant
The electronic and optical properties of colloidal multi-shell ZnS/CdS nanoheterostructures have been studied in the framework of empirical tight-binding models...
S Kato, J A. de Gouw, C D. Lin, V M. Bierbaum, S R. Leone
The charge transfer reaction of N 2 +(v=0-4) + KR->N 2 + Kr + is studied at thermal energy as a function of vibrational excitation in the reactant ion. A...
F Lang, P Van der Straten, B Brandstatter, G Thalhammer, K Winkler, Paul S. Julienne, R Grimm, J Hecker Denschlag
The emerging field of ultracold molecules with their rich internal structure is currently attracting a lot of interest. Various methods have been developed to...
Theoretical cross sections for electron-impact ionization of the neutral W atom and W$^+$ ion are reported. The direct ionization cross sections were calculated...
A comprehensive study of the structural and electronic properties of the interesting onion-skin-like [As@Ni_12As_20]^3- cluster ion, characterized by Moses et...
T P. Marcy, R R. Diaz, Dwayne E. Heard, S R. Leone, L B. Harding, S J. Klippenstein
Combined experimental and theoretical investigations of the title reactions are presented. Time-resolved Fourier transform infrared (FTIR) emission studies of...
We present calculations of the Thomas-Fermi wave functions for two simultaneously trapped and condensed hyperfire states of 87rb which has recently observed [C...
A O. Govorov, Garnett W. Bryant, Wei Zhang, T Skieni, J Lee, N A. Kotov, Joseph M. Slocik, Rajesh R. Naik
We describe physical properties of excitons in hybrid complexes composed of semiconductor and metal nanoparticles. The interaction between individual...
J Chwedenczuk, K Goral, T K hler, Paul S. Julienne
We provide a practical approach to the molecular production via linear downward sweeps of Feshbach resonances in degenerate Fermi gases containing incoherent...
Theoretical cross sections for electron-impact ionization of the neutral Mo Atom and Mo+ ion are reported. Both Mo and Mo+ have many metastable levels near the...
Both theoretical and experimental electron-impact total ionization cross sections of CF 4, C 2F 6 and C 3F 8 are presented. The experimental cross sections have...
R H. Xie, Garnett W. Bryant, L Jensen, J Zhao, J H. Smith
We perform first-principles calculations of the structural, electronic, vibrational and magnetic properties of C 48 N 12 azafullerene and C 60. Full geometrical...
M Krishnamurthy, J A. de Gouw, V M. Bierbaum, S R. Leone
Benzene dimer cations (C 12H 12+and C 12H 11+) are produced in the flow tube section of a selected-ion flow-drift tube (SIFDT) apparatus. The reduced mobilities...
The relative coherent ionization yield of lithium dimer is measured quantitatively in a two-color pump-probe femtosecond experiment usingpump pulses around 800...
J-F Wyart, Ali Meftah, Wan-U Lydia Tchang-Brillet, Norbert Champion, O Lamrous, Nissan Spector, J Sugar
Recent breakthrough in the analysis of Nd IV resulted in the establishment of 37 energy levels of the ground configuration 4f^3. We report here the completion...
The radiative characteristics (spectral effective emissivity, spectral radiance, and radiance temperature) of blackbody calibration sources widely used in...