Two-color photoassociation spectroscopy of ytterbium atoms and the precise determinations of s-wave scattering lengths
Two-color photoassociation spectroscopy of ytterbium atoms and the precise determinations of s-wave scattering lengths
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DOI：
10.1103/physreva.77.012719
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发表时间：
2008-01-01
影响因子：
2.9
通讯作者：
Julienne, Paul S.
中科院分区：
文献类型：
--
作者：
Kitagawa, Masaaki;Enomoto, Katsunari;Julienne, Paul S.
通过进行高分辨率的双色光缔合光谱，我们已经成功地确定了几个最后的束缚态的homopolymer二聚体的六种不同的镱同位素的结合能。这些光谱数据与基于简单模型势的理论计算非常一致，该模型势非常精确地预测了所有28对7种稳定同位素的s波散射长度。Yb-168、Yb-170、Yb-171、Yb-31.7、Yb-170、Yb-0.15、Yb-171、Yb-0.15、Yb-170、Yb-171、Yb-0.15、Yb-170、Yb-171、Yb-17 Yb-172为10.55（11）nm，Yb-174为5.55（8）nm，Yb-176为-1.28（23）nm。Yb-2分子的长程货车德瓦耳斯势的超前项系数为C-6=1932（30）原子单位（E（h）a（0）（6）约为9.573 × 10 ~（-26）J nm（6））。
By performing high-resolution two-color photoassociation spectroscopy, we have successfully determined the binding energies of several of the last bound states of the homonuclear dimers of six different isotopes of ytterbium. These spectroscopic data are in excellent agreement with theoretical calculations based on a simple model potential, which very precisely predicts the s-wave scattering lengths of all 28 pairs of the seven stable isotopes. The s-wave scattering lengths for collision of two atoms of the same isotopic species are 13.33(18) nm for Yb-168, 3.38(11) nm for Yb-170, -0.15(19) nm for Yb-171, -31.7(3.4) nm for Yb-172, 10.55(11) nm for Yb-173, 5.55(8) nm for Yb-174, and -1.28(23) nm for Yb-176. The coefficient of the lead term of the long-range van der Waals potential of the Yb-2 molecule is C-6=1932(30) atomic units (E(h)a(0)(6)approximate to 9.573x10(-26) J nm(6)).