Experiments to Test Time Reversal Symmetry (Physics)

建立了一台分子束装置，利用TLF分子的核自旋共振对T对称性进行了精确的测试。这些测试的目的是为了解释为什么中性K系统中的时间反转对称性被破坏。提出了利用超音速射流源将装置的灵敏度提高一个数量级以上。将在Tl核上进行额外的测量，并在F上进行新的测量。这项技术将扩展到其他系统。初步运行将使用CSF，这是一种与TLF非常相似的工具。将寻求处理EUS和PBS的技术，它们提出了新的实验问题。

A molecular beam apparatus has been built to make a precise test of T symmetry using nuclear spin resonance in the TlF molecule. Such tests are aimed at explaining why time reversal symmetry is violated in the neutral K system. It is proposed to improve the sensitivity of the apparatus more than an order of magnitude by means of a supersonic jet source. Additional measurements will be made on the Tl nucleus and new measurements on F. The technique will be extended to other systems. Preliminary runs will be made using CsF, a close analog of TlF. Techniques will be sought to deal with EuS and PbS, which present new experimental problems.