Retraction: Optical pumping nuclear magnetic resonance system rotating in a plane parallel to the quantization axis
Zhi-Chao Ding(丁志超), Jie Yuan(袁杰), Hui Luo(罗晖), Xing-Wu Long(龙兴武)
Chin. Phys. B . 2017, (11): 113301 -113301 .  DOI: 10.1088/1674-1056/26/11/113301