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Journals

High Temperature Deformation of Silicon Nitride

Author(s)
Sheldon M. Wiederhorn
Three mechanisms for the creep of silicon nitride are discussed with regard to the microstructural variables that control creep. During the initial stages of...

The International Standards System and NDE

Author(s)
Thomas A. Siewert
The globalization of manufacturing and construction markets is broadening the range of inspection standards that might be specified for a product, and we should...

Size Change of Dendrimers in Concentrated Solution

Author(s)
A Topp, Barry J. Bauer, T J. Prosa, R L. Scherrenberg, Eric J. Amis
Solutions of the poly(propylene imine) dendrimers DAB-dendr-(NH 2) 23 and DAB-dendr-(NH 2) 64 in methanol are investigated with small angle neutron scattering...

Hydrodynamic Excitations for a Trapped Fermi Gas

Author(s)
G M. Bruun, Charles W. Clark
We discuss collective excitations of a trapped dilute Fermi gas within a hydrodynamic approximation. Analytical results are derived for both high- and low...

Creation of an Ultracold Neutral Plasma

Author(s)
T C. Killian, S Kulin, S D. Bergeson, Luis A. Orozco, C R. Orzel, S L. Rolston
We report the creation of an ultracold neutral plasma by photoionization of laser-cooled xenon atoms. The charge carrier density is as high as 2 x 10 9 cm -3...

Giving a Boost to Atoms

Author(s)
Kristian Helmerson
Matter waves can now be amplified in the same way that a laser amplifies light. Such matter-wave amplifiers will be essential for future developments in atom...

Precision Spectroscopy in He as a Test of QED

Author(s)
S Bergeson, A Balakrishnan, K G. Baldwin, Thomas B. Lucatorto, J P. Marangos, T J. McIlrath, Thomas R. O'Brian, S L. Rolston, Craig J. Sansonetti, J Wen, N Westbrook, C H. Cheng, E E. Eyler
High resolution laser-based measurements of energy levels have spurred the development and refinement of quantum electrodynamic calculations. We have extended...

Temporal, Matter-Wave Dispersion Talbot Effect

Author(s)
Lu Deng, Edward W. Hagley, J Denschlag, J E. Simsarian, M Edwards, Charles W. Clark, Kristian Helmerson, S L. Rolston, William D. Phillips
We analyze and experimentally demonstrate a new (temporal) Talbot effect, where a pulsed phase grating is applied to a cloud of cold atoms (Bose-Einstein...
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