铯原子$6s ^2S_{1/2} \rightarrow 7p ^2P_J$跃迁径向矩阵元的测量
Measurement of the radial matrix elements for the $6s ^2S_{1/2} \rightarrow 7p ^2P_J$ transitions in cesium
摘要：
我们报告测量的电偶极子矩阵元素的$^{133}$ Cs $\ $ $6s\,^2S_{1/2} \rightarrow 7p\,^2P_{1/2}$和$6s\,^2S_{1/2} \rightarrow 7p\,^2P_{3/2}$过渡。这些测定中的每一个都是基于两条吸收线之间的吸收系数的直接、精确的比较。对于$\langle 6s\,^2S_{1/2}||r|| 7p\,^2P_{3/2} \rangle$矩阵元，我们测量了这条线上的吸收系数与D $_1$跃迁的吸收系数之比，即$6s\,^2S_{1/2} \rightarrow 6p\,^2P_{1/2}$。D $_1$线的矩阵元素已经由许多小组以高精度预先确定。对于$\langle 6s\,^2S_{1/2}||r|| 7p\,^2P_{1/2} \rangle$矩阵元，我们测量了这条线上的吸收系数与$6s\,^2S_{1/2} \rightarrow 7p\,^2P_{3/2}$跃迁的吸收系数之比。我们对这些矩阵元素的结果是$\langle 6s\,^2S_{1/2}||r|| 7p\,^2P_{3/2} \rangle = 0.57417 \: (57)~a_0$和$\langle 6s\,^2S_{1/2}||r|| 7p\,^2P_{1/2} \rangle = 0.27810 \: (45)~a_0$。这些测量结果对解释原子中的宇称不守恒有意义。
英文摘要：
We report measurements of the electric dipole matrix elements of the $^{133}$Cs $\ $ $6s\,^2S_{1/2} \rightarrow 7p\,^2P_{1/2}$ and $6s\,^2S_{1/2} \rightarrow 7p\,^2P_{3/2}$ transitions. Each of these determinations is based on direct, precise comparisons of the absorption coefficients between two absorption lines. For the $\langle 6s\,^2S_{1/2}||r|| 7p\,^2P_{3/2} \rangle$ matrix element, we measure the ratio of the absorption coefficient on this line with that of the D$_1$ transition, $6s\,^2S_{1/2} \rightarrow 6p\,^2P_{1/2}$. The matrix element of the D$_1$ line has been determined with high precision previously by many groups. For the $\langle 6s\,^2S_{1/2}||r|| 7p\,^2P_{1/2} \rangle$ matrix element, we measure the ratio of the absorption coefficient on this line with that of the $6s\,^2S_{1/2} \rightarrow 7p\,^2P_{3/2}$ transition. Our results for these matrix elements are $\langle 6s\,^2S_{1/2}||r|| 7p\,^2P_{3/2} \rangle = 0.57417 \: (57)~a_0$ and $\langle 6s\,^2S_{1/2}||r|| 7p\,^2P_{1/2} \rangle = 0.27810 \: (45)~a_0$. These measurements have implications for the interpretation of parity nonconservation in atoms.
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