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.
mtosecond laser excitation through a near-field scanning optical microscope is used to study spatially resolved defects in the two-photon conductivity of a GaAs
R B. Little, M El-Sayed, Garnett W. Bryant, S Burke
Two-dimensional, layered superlattice structures have been exploited extensively in the synthesis of quality optoelectronic devices. Structures with small
J Pesce, Z Amitay, R Uberna, S R. Leone, M Ratner, R Kosloff
The Li 2 species offers an ideal system to compare experimental pump/probe ultrafast photoionization with quantum dynamical calculations on well characterized
I Kink, J M. Laming, E Takacs, James V. Porto, John D. Gillaspy, E Silver, H. Schnopper, Simon R. Bandler, M Barbera, N Brickhouse, S Murray, D Landis, J. Beeman, E. E. Haller
Spectra of highly charged Ar, Kr, Xe and Fe ions, produced in an Electron Beam Ion Trap (EBIT), have been recorded in a broad x-ray energy band (0.2 keV to 10
The absolute frequency of an iodine-stabilized He-Ne laser at 633 nm stabilized on the I (or a 13) component of the 11-5 R(127) hyperfine transition of the 127I
R K. Shelton, L -. Ma, H C. Kapteyn, M M. Murnane, J L. Hall, Jun Ye
Two independent mode-locked femtosecond lasers are synchronized to an unprecedented precision. The rms timing jitter between the lasers is 4.3 fs observed
Harold V. Parks, D S. Robertson, A M. Pattee, J E. Faller
Of all the fundamental constants of nature, the Newtonian constant of gravitation, G, has been one of the most difficult to measure. The current CODATA value of
C Samuelis, Eite Tiesinga, T Laue, M Elbs, H Knockel, E Tiemann
We observe bound states just below the dissociation limit and shape and Feshback resonances between the ground state hyperfine asymtotes by Raman spectroscopy
E Takacs, Z Ber nyi, John D. Gillaspy, L P. Ratliff, Ronaldo Minniti, J Pedulla, R Deslattes, N Stolterfoht
We have studied the spectrum of x-rays emitted when hydrogen-like argon ions impact silicon dioxide surfaces. Specifically, we were interested in the mechanism
According to New Synthesis doctrine, the direction of evolution is determined by selection and not by internal causes that act by way of propensities of
A new experimental procedure for studying the kinetics and thermodynamics of chemical reactions in supercritical fluids-solvents was suggested. The kinetics and
E L. Rachofsky, E Seibert, J T. Stivers, R Osman, J B. Ross
asic sites are highly mutagenic lesions in DNA that arise as intermediates in the excision repair of modified bases. These sites are generated by the action of
We describe a laser system for very high-accuracy dimensional metrology. A sealed-cavity helium-neon laser is offset-locked to an iodine-stabilized laser in
We have used normal metal-insulator-superconductor (NIS) microcalorimeter to measure the impact energy of protein ions produced by electrospray ionization (ESI)
Magnetic combinatorial libraries have been fabricated to investigate complex magnetic thin-film systems and to provide test systems to develop on-wafer
Kristy Lenz, Dawn Rabbach, Chao Liu, Quyi Xu, Ying Zeng, Becky Steffen, Douglas Storts
The VersaPlex™ 27PY System is an STR multiplex from Promega offering co-amplification of 27 loci. This six-dye multiplex was designed for casework samples and
A G. Lieberman, Kathleen M. Higgins, Nicholas Paulter
The guide provides the law enforcement and corrections (LEC) community with information concerning the theory and limits of operation of hand-held and walk
This paper evaluates performance merits of CO 2 and R134a automotive air conditioning systems using semi-theoretical cycle models. The R134a system had a
Most cellular solids are random materials, while practically all theoretical results are for periodic models. To be able to generate theoretical results for
The National Institute of Standards and Technology (NIST) has compiled and maintained a Short Tandem Repeat DNA Internet Database (http://www.cstl.nist.gov
We present all stationary solutions to the nonlinear Schrodinger equation in one dimension for box and periodic boundary conditions. For both repulsive and