  The momentum spectra of K+ produced at small angles in proton-proton and
proton-deuteron collisions have been measured at four beam energies, 1.826,
1.920, 2.020, and 2.650 GeV, using the ANKE spectrometer at COSY-Juelich. After
making corrections for Fermi motion and shadowing, the data indicate that K+
production near threshold is stronger in pp- than in pn-induced reactions.
However, most of this difference could be made up by the unobserved K0
production in the pn case.
