物体转动过程中值得注意的一个问题

通过错题分析,说明在解决力学问题中坐标系的恰当选择的重要性.     

机械运动能改变放射性同位素的半衰期吗？

采用液闪测量法考察了机械运动对放射性核素^32P的β^-衰变速率的影响．结果表明,在地球北半球的逆时针圆周离心运动条件下（半径10cm,4000r／min）,^32P的β^-衰变速率与自然条件下的衰变速率在测量不确定度范围（0．6％）内没有变化．     

Interfacial spin Hall current in a Josephson junction with Rashba spin—orbit coupling

We theoretically investigate the spin transport properties of the Cooper pairs in a conventional Josephson junction with Rashba spin-orbit coupling considered in one of the superconducting leads.It is found that an angle-resolved spin supercurrent flows through the junction and a nonzero interfacial spin Hall current driven by the superconducting phase difference also appears at the interface.The physical origin of this is that the Rashba spin-orbit coupling can induce a triplet order parameter in the s-wave superconductor.The interfacial spin Hall current dependences on the system parameters are also discussed.