Retraction: Optical pumping nuclear magnetic resonance system rotating in a plane parallel to the quantization axis

Requested by the authors,the article entitled “Optical pumping nuclear magnetic resonance system rotating in a plane parallel to the quantization axis”,published in Chinese Physics B,2017,Vol.26,Issue 9,Article No.093301,has been withdrawn from the publication.The authors found that the axes in the rotating frame xy'z are not all time-invariant,so Eq.(12) obtained from Eq.(11) is incorrect,and the conclusion is inaccurate.