Skip to main content
U.S. flag

An official website of the United States government

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.

Search Publications

NIST Authors in Bold

Displaying 40076 - 40100 of 74400

Ballistic Expansion and Collisions in the Cs Atomic Fountain Clock

January 1, 2004
Author(s)
V Venturi, Eite Tiesinga, Carl J. Williams
We study the effects of the ballistic expansion of an atomic cloud on theoretical predictions of the collisional shifts in the Cesium atomic fountain clock. Due to the strong energy dependence of the collisional shift, we find that the ballistic expansion

Characterization of Precision Spheres With XCALIBIR

January 1, 2004
Author(s)
Ulf Griesmann, Johannes A. Soons, Quandou (. Wang
The geometry of a nearly spherical surface, for example that of a precision optic, is completely determined by the radius-of-curvature at one point and the deviation from the perfect spherical form at all other points of the sphere. Measurements of radius
Displaying 40076 - 40100 of 74400
Was this page helpful?