We report the measurement of one-body loss rates for magnetically trapped metastable europium atoms and the study of their loss mechanism. The loss of atoms observed in a magneto-optical trap is not fully understood because of the indivisibility of the loss regarding optical pumpings due to the presence of cooling laser beams. We magnetically trapped the atoms by directly loading from the magneto-optical trap and observed almost identical one-body loss rates of approximately 2.6 s⁻¹ for two isotopes: ¹⁵¹Eu and ¹⁵³Eu. Our rate-equation-based model, combined with loss rate measurements carried out with repumpers, shows that blackbody radiation at room temperature drives E1 transitions and induces the observed losses.

我们报告了磁性俘获亚稳态铕原子整体损失率的测量及其损失机制的研究。由于冷却激光束的存在，光泵浦的损失是不可分割的，因此在磁光陷阱中观察到的原子损失尚不完全清楚。我们通过直接从磁光陷阱加载来磁性捕获原子，并观察到几乎相同的单体损失率，对于两种同位素：¹⁵¹ Eu 和¹⁵³ Eu ，大约为 2.6  s ^-1。我们基于速率方程的模型，结合使用再泵进行的损耗率测量，表明室温下的黑体辐射驱动 E1 跃迁并引起观察到的损耗。