Experiments to Test Time Reversal Symmetry (Physics)
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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.
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