Momentum-space crystal in narrow-line cooling of <sup>87</sup>Sr<xref rid="cpb_28_1_013701fn1" ref-type="fn">*</xref><fn id="cpb_28_1_013701fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant Nos. 11474282 and 61775220), the Key Research Project of Frontier Science of the Chinese Academy of Sciences (Grant No. QYZDB-SSW-JSC004), and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB21030100).</p></fn>

Momentum-space crystal in narrow-line cooling of ⁸⁷Sr**

Project supported by the National Natural Science Foundation of China (Grant Nos. 11474282 and 61775220), the Key Research Project of Frontier Science of the Chinese Academy of Sciences (Grant No. QYZDB-SSW-JSC004), and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB21030100).

Han Jian-Xin^{1, 2}, Lu Ben-Quan¹, Yin Mo-Juan¹, Wang Ye-Bing^{1, 2}, Xu Qin-Fang¹, Lu Xiao-Tong^{1, 2}, Chang Hong^{1, 2, †}

The MSC with different interaction times. (a) The distribution of final velocity versus initial velocity at interaction time of 15 ms (black solid), 20 ms (red dot), and 25 ms (blue dash), with s = 100 and δ = 120 kHz. (b) Variation in the MSC spatial distribution with interaction time of 15 ms, 20 ms, and 25 ms.