Related Experiment Video
Updated: Aug 1, 2026

Spatial Separation of Molecular Conformers and Clusters
Published on: January 9, 2014
Reduction of the cold collisions frequency shift in a multiple velocity fountain: a new proposal
Abstract:
In this paper, we propose a new scheme for operating an atomic fountain frequency standard. A sequence of time-spaced balls of atoms, launched over non-overlapping trajectories, makes possible a reduction of the atomic density and consequently the cold collision frequency shift by one order of magnitude without significant reduction of the useful signal and of the overall stability of the clock. The ultimate accuracy of a Cs fountain could be improved below the 10(-15) level currently achieved in operating clocks.
Related Concept Videos
Doppler Effect - I
Doppler Effect - II
Atomic Nuclei: Larmor Precession Frequency
Maxwell-Boltzmann Distribution: Problem Solving
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by
Accelerating Fluids
The motion of the liquid within this infinitesimal cylinder is considered to obtain the pressure difference. Three vertical forces act on this liquid:
Free Jet

