Experimental evidence for spin-orbit interactions in positronium-Xe collisions.
Experimental evidence for spin-orbit interactions in positronium-Xe collisions.
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DOI：
10.1103/physrevlett.97.253402
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发表时间：
2006-12
影响因子：
8.6
通讯作者：
H. Saito;T. Hyodo
中科院分区：
文献类型：
--
作者：
H. Saito;T. Hyodo
正电子素（Ps）与周围原子的自旋-轨道相互作用，由Mitroy和Novikov预测[Phys. Rev. Lett. 90，183202（2003）]，已经通过实验检测到。我们已经发现，当施加1.0 T的磁场时，在1 atm的氦气中磁未扰动的ortho-Ps的寿命显著降低。这种下降归因于在Ps-PdR碰撞过程中由自旋-轨道相互作用引起的Ps自旋转换。由于这种相互作用，ortho-Ps的湮灭截面已被确定为Mitroy和Novikov预期的3倍。
Spin-orbit interaction of positronium (Ps) with the surrounding atoms, predicted by Mitroy and Novikov [Phys. Rev. Lett. 90, 183202 (2003)], has been detected experimentally. We have found that the lifetime of the magnetically unperturbed ortho-Ps in Xe gas of 1 atm decreases significantly when a magnetic field of 1.0 T is applied. This decrease is attributed to the Ps spin conversion caused by spin-orbit interaction during Ps-Xe collision. The annihilation cross section of ortho-Ps due to this interaction has been determined to be 3 times as large as that expected by Mitroy and Novikov.