NMR on protons from a polarized cyclotron beam

Conventional pulse NMR uses the nuclear polarization due to the Boltzmann d istribution, which is of the order of 10(-5) for protons at room temperatur e in typical magnetic fields. About five orders of magnitude in sensitivity can therefore be gained if polarization of the order of 100% is achieved b y other means. We report the first detection of free induction decay signal s of protons from a polarized cyclotron beam implanted into liquid D2O and Br-2. Possible applications are discussed. (C) 1999 Elsevier Science B.V. A ll rights reserved.