Thermal compression of two-dimensional atomic hydrogen to quantum degeneracy
Soft Condensed Matter
2009-11-10 v1
Abstract
We describe experiments where 2D atomic hydrogen gas is compressed thermally at a small "cold spot" on the surface of superfluid helium and detected directly with electron-spin resonance. We reach surface densities up to 5e12 1/cm^2 at temperatures of approximately 100 mK corresponding to the maximum 2D phase-space density of about 1.5. By independent measurements of the surface density and its decay rate we make the first direct determination of the three-body recombination rate constant and get the value of 2e-25 cm^4/s for its upper bound, which is an order of magnitude smaller than previously reported experimental results.
Cite
@article{arxiv.cond-mat/0303496,
title = {Thermal compression of two-dimensional atomic hydrogen to quantum degeneracy},
author = {S. Vasilyev and J. Jarvinen and A. I. Safonov and S. Jaakkola},
journal= {arXiv preprint arXiv:cond-mat/0303496},
year = {2009}
}
Comments
4 pages, 4 postscript figures, bibliography (.bbl) file, submitted to PRL