Parity violation in atomic ytterbium: Experimental sensitivity and systematics
Parity violation in atomic ytterbium: Experimental sensitivity and systematics
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原子镱的宇称不守恒：实验灵敏度和系统学
DOI：
10.1103/physreva.81.032114
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发表时间：
2010
影响因子：
2.9
通讯作者：
D. Budker
中科院分区：
文献类型：
--
作者：
K. Tsigutkin;D. Dounas;A. Family;J. Stalnaker;V. Yashchuk;D. Budker
我们详细描述了6s 2 1 S 0中宇称违反的观察结果！5d 6s 3 D1 408-nm镱的禁戒跃迁，这是之前的一个简要报告。线偏振408 nm光与Yb原子在交叉E场和B场中相互作用。408 nm跃迁的几率包含一个宇称违反项，正比于（E · B）[（E × E）· B]，它是由E场（E是光的电场）引起的宇称违反振幅和斯塔克振幅之间的干涉引起的。跃迁概率是通过测量3 P0态的粒子数来检测的，其中65%的被激发到3D 1态的原子自发衰变。3 P0态的布居数是通过用649 nm的光共振激发原子到6s 7s 3 S1态并收集其衰变产生的荧光来确定的。在辅助实验中确定了由于E场和B场缺陷引起的系统校正。的统计不确定性占主导地位的寄生频率偏移的408 nm的激发光由于不完善的稳定性的光学参考相对于原子共振。目前的不确定性是9%的统计和8%的系统。为今后的实验提高精度的方法进行了讨论。
We present a detailed description of the observation of parity violation in the 6s 2 1 S0 ! 5d6s 3 D1 408-nm forbidden transition of ytterbium, a brief report of which appeared earlier. Linearly polarized 408-nm light interacts with Yb atoms in crossed E- and B-fields. The probability of the 408nm transition contains a parity violating term, proportional to (E · B)[(E × E) · B], arising from interference between the parity violating amplitude and the Stark amplitude due to the E-field (E is the electric field of the light). The transition probability is detected by measuring the population of the 3 P0 state, to which 65% of the atoms excited to the 3 D1 state spontaneously decay. The population of the 3 P0 state is determined by resonantly exciting the atoms with 649-nm light to the 6s7s 3 S1 state and collecting the fluorescence resulting from its decay. Systematic corrections due to E-field and B-field imperfections are determined in auxiliary experiments. The statistical uncertainty is dominated by parasitic frequency excursions of the 408-nm excitation light due to imperfect stabilization of the optical reference with respect to the atomic resonance. The present uncertainties are 9% statistical and 8% systematic. Methods of improving the accuracy for the future experiments are discussed.