{sup 3}He polarization-dependent EPR frequency shifts of alkali-metal-{sup 3}He pairs
{sup 3}He polarization-dependent EPR frequency shifts of alkali-metal-{sup 3}He pairs
复制标题
碱金属-{sup 3}He 对的 {sup 3}He 偏振相关 EPR 频移
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
Thad G. Walker
中科院分区：
文献类型：
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作者：
E. Babcock;I. Nelson;Steve Kadlecek;Thad G. Walker
We present temperature-dependent measurements of the EPR frequency shifts for Na, K, and Rb interacting with polarized $^{3}\mathrm{He}$. K and Na frequency shifts were measured via comparison with Rb frequency shifts (well known at low temperatures) in $\mathrm{Na}\ensuremath{-}\mathrm{Rb}\ensuremath{-}^{3}\mathrm{He}$ and $\mathrm{K}\ensuremath{-}\mathrm{Rb}\ensuremath{-}^{3}\mathrm{He}$ spin-exchange cells. The lowered Rb vapor pressure of these ``hybrid'' spin-exchange cells also allowed us to extend the measured temperature dependence of the Rb EPR frequency shifts up to $350\phantom{\rule{0.2em}{0ex}}\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}$. This work presents measurements of the EPR frequency shift for Na in $^{3}\mathrm{He}$ and significantly extends the temperature range of previous Rb and K EPR frequency shift measurements. These results are critical to the performance of accurate $^{3}\mathrm{He}$ EPR polarimetry in spin-exchange cells.
We present temperature-dependent measurements of the EPR frequency shifts for Na, K, and Rb interacting with polarized $^{3}\mathrm{He}$. K and Na frequency shifts were measured via comparison with Rb frequency shifts (well known at low temperatures) in $\mathrm{Na}\ensuremath{-}\mathrm{Rb}\ensuremath{-}^{3}\mathrm{He}$ and $\mathrm{K}\ensuremath{-}\mathrm{Rb}\ensuremath{-}^{3}\mathrm{He}$ spin-exchange cells. The lowered Rb vapor pressure of these ``hybrid'' spin-exchange cells also allowed us to extend the measured temperature dependence of the Rb EPR frequency shifts up to $350\phantom{\rule{0.2em}{0ex}}\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}$. This work presents measurements of the EPR frequency shift for Na in $^{3}\mathrm{He}$ and significantly extends the temperature range of previous Rb and K EPR frequency shift measurements. These results are critical to the performance of accurate $^{3}\mathrm{He}$ EPR polarimetry in spin-exchange cells.