We demonstrate a new method for simultaneously measuring the spin polarizations of noble gas and alkali metal atoms. Under a low magnetic field, the polarized alkali metal and noble gas spin ensembles exhibit novel dynamics in the self-compensation and resonance regimes, which can be used to measure the polarizations. We perform this method on a K-Rb-$^{21}\rm{Ne}$ comagnetometer with various operation temperatures and pump light intensities. The polarization of alkali metal electrons from 0.245 to 0.964, and the polarization of noble gas nuclear spins from 0.01 to 0.065 are measured with relative uncertainties less than 12.4$\%$. The measured polarizations are consistent with the theoretical model and are also verified by the traditional polarization measurement method.

中文翻译：

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基于自旋集合体的动力学同时测定稀有气体和碱金属原子的自旋极化

我们展示了一种同时测量稀有气体和碱金属原子的自旋极化的新方法。在低磁场下，极化的碱金属和稀有气体自旋集合在自补偿和共振状态下表现出新颖的动力学，可用于测量极化。我们在具有不同工作温度和泵浦光强度的K-Rb- $ ^ {21} \ rm {Ne} $电磁仪上执行此方法。测量的碱金属电子的极化度为0.245至0.964，惰性气体核自旋的极化度为0.01至0.065，相对不确定度小于12.4。$％$。测得的偏振态与理论模型一致，并且也通过传统的偏振测量方法进行了验证。