Charge Distribution for 133Xe-133Cs Decay Process

Comments on Methods for Charge Decay Measurement

Comments are made on the features of the various methods in use for measurement of charge decay. It is noted that none of the methods that start with the material charged and tested by earthing the test area boundary can be considered valid because this situation does not match practical experience. It is noted that any valid method must give results that match the behaviour of a variety of mat...

Understanding Beta Decay for the R Process

Superexponential Decay for the Gem Process

We show that the GEM process has strong ordering properties: the probability that the k-th largest element in the GEM sequence is beyond the rst ck elements (c > 1) decays super-exponentially in k. Let fU i g 1 i=1 denote a sequence of 0; 1] valued i.i.d. random variables, with common law possessing a density p (x) = x ?1. Here, > 0 is a xed known parameter, and throughout we use U i = 1 ? U i....

Collision properties of ultracold 133Cs atoms

We present a theoretical analysis of numerous magnetically tunable Feshbach resonances measured by Chin et al. [preceding Letter, Phys. Rev. Lett. 85, 2717 (2000)] at fields of up to 25 mT. This analysis provides the most accurate characterization of the collisional properties of ground state Cs atoms currently available and clearly shows, in contrast to previous work, that Bose-Einstein conden...

Collisional frequency shifts in 133Cs fountain clocks.

We present a theoretical analysis of the density dependent frequency shift in Cs fountain clocks using the highly constrained binary collision model described by Leo et al. [Phys. Rev. Lett. 85, 2721 (2000)]. We predict a reversal in the clock shift at temperatures near 0.08 microK. Our results show that s waves dominate the collision process. However, as a consequence of the large scattering l...