Blackbody ac Zeeman shift at room temperature is calculated to be of 10-15 order, thus should be corrected for the cesium fountain frequency standard in determining the accuracy of the standard.

• 结果表明: 1) 室温下黑体辐射塞曼频移可达10-15量级, 在评定铯原子喷泉频标准确度时, 需要对此项频移加以修正;