# Anisotropic Hyperfine Interactions Limit the Efficiency of Spin-Exchange Optical Pumping of 3He Nuclei

 Title: Anisotropic Hyperfine Interactions Limit the Efficiency of Spin-Exchange Optical Pumping of 3He Nuclei Author: Tscherbul, T. V.; Zhang, Peng; Sadeghpour, Hossein R.; Dalgarno, Alexander Note: Order does not necessarily reflect citation order of authors. Citation: Tscherbul, T. V., P. Zhang, H. R. Sadeghpour, and A. Dalgarno. 2011. Anisotropic Hyperfine Interactions Limit the Efficiency of Spin-Exchange Optical Pumping of 3He Nuclei. Physical Review Letters 107, no. 2: 023204. Access Status: Full text of the requested work is not available in DASH at this time (“dark deposit”). For more information on dark deposits, see our FAQ. Full Text & Related Files: 38410703.pdf (228.8Kb; PDF) Abstract: We use accurate ab initio and quantum scattering calculations to demonstrate that the maximum He3 spin polarization that can be achieved in spin-exchange collisions with potassium (K39) and silver (Ag107) atoms is limited by the anisotropic hyperfine interaction. We find that spin exchange in Ag-He collisions occurs much faster than in K-He collisions over a wide range of temperatures (10–600 K). Our analysis indicates that measurements of trap loss rates of S2 atoms in the presence of cold He3 gas may be used to probe anisotropic spin-dependent interactions in atom-He collisions. Published Version: doi:10.1103/PhysRevLett.107.023204 Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:12717324 Downloads of this work: