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The polarized ion source for COSY-Jülich has been set in operation. The source produces H− or D− ion beams by means of a charge exchange reaction. For the first time beam acceleration in the injector cyclotron and a first measurement of the beam polarization downstream of the cyclotron took place. The working scheme of this colliding-beam source and the latest results are discussed.

An analysis of all available experimental data of the mirror fusion reactions D(d,n)3He and D(d,p)3 H below 500 keV is presented. Account is taken of S-, P-, and D-waves in the input channels of the reactions. All 16 participating transition amplitudes are obtained by a fit to the experimental data. In accordance with refined resonating group calculations no suppression of quintet entrance-state transitions and therefore no neutron suppression in "polarized fusion" can be derived

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