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Bulletin of the American Physical Society

Measurement of the $\beta$-asymmetry in the decay of magneto-optically trapped, spin-polarized $^{37}\mathrm{K}$

Benjamin Fenker, M. Anholm, D. Ashery, Spencer Behling, John Behr, I. Cohen, Alexandre Gorelov, G. Gwinner, M. Mehlman, D. Melconian, P. D. Shidling, Claire Warner

Published Oct 10, 2014• 0 citations
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The behavior of atoms in an optical far-off resonance trap is found to depend strongly on the trap polarization. Large loss rates occur unless the polarization is perfectly linear or perfectly circular, in which case exponential lifetimes up to 10 s are observed. Through optimization of trap loading, samples of $4\ifmmode\times\else\texttimes\fi{}{10}^{6}$ atoms are obtained in a circularly polarized trap. Spin polarization of $98(1)%$ is measured. This trap should prove useful for precision measurements such as $\ensuremath{\beta}$-decay asymmetry and should make rf cooling possible in optical traps.

Physical Review Letters•Aug 16, 1999•99 citations
Measurement of the β\betaβ-asymmetry in the decay of magneto-optically trapped, spin-polarized 37K^{37}\mathrm{K}37K
Spin Polarization Diagnostics for Magneto-optical Trapped β+\beta^{+}β+-Decaying Atoms
The behavior of atoms in an optical far-off resonance trap is found to depend strongly on the trap polarization. Large loss rates occur unless the polarization is perfectly linear or perfectly circular, in which case exponential lifetimes up to 10 s are observed. Through optimization of trap loading, samples of $4\ifmmode\times\else\texttimes\fi{}{10}^{6}$ atoms are obtained in a circularly polarized trap. Spin polarization of 98(1)98(1)%98(1) is measured. This trap should prove useful for precision measurements such as $\ensuremath{\beta}$-decay asymmetry and should make rf cooling possible in optical traps.