Large Spin Relaxation Rates in Trapped Submerged-Shell Atoms

 Title: Large Spin Relaxation Rates in Trapped Submerged-Shell Atoms Author: Connolly, Colin Bryant; Au, Yat Shan; Doret, S. Charles; Ketterle, Wolfgang; Doyle, John M. Note: Order does not necessarily reflect citation order of authors. Citation: Connolly, Colin B., Yat Shan Au, S. Charles Doret, Wolfgang Ketterle, and John M. Doyle. 2010. Large spin relaxation rates in trapped submerged-shell atoms. Physical Review A 81(1): 010702. Full Text & Related Files: PhysRevA_81_010702R.pdf (358.7Kb; PDF) Abstract: Spin relaxation due to atom–atom collisions is measured for magnetically trapped erbium and thulium atoms at a temperature near 500 mK. The rate constants for Er–Er and Tm–Tm collisions are 3.0×10$$^{-10}$$ and 1.1×10$$^{-10}$$ cm$$^3$$ s$$^{-1}$$, respectively, 2–3 orders of magnitude larger than those observed for highly magnetic S-state atoms. This is strong evidence for an additional, dominant, spin relaxation mechanism, electronic interaction anisotropy, in collisions between these “submerged-shell,” L≠0 atoms. These large spin relaxation rates imply that evaporative cooling of these atoms in a magnetic trap will be highly inefficient. Published Version: doi:10.1103/PhysRevA.81.010702 Other Sources: dspace.mit.edu/openaccess-disseminate/1721.1/56256 Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:11073734 Downloads of this work: