INVESTIGATION OF OXYGEN AND FLUORINE DISTRIBUTIONS USING NUCLEAR-REACTION ANALYSIS AT THE ROSSENDORF NUCLEAR MICROPROBE

The nuclear microprobe at the 5 MV tandem accelerator of the Central Institute for Nuclear Research at Rossendorf is realized by object diaphragms of 50, 70 and 100-mu-m and a magnetic quadrupole triplet. The proton microbeam with a spot size of about 4-mu-m is used for NRA. Depth profiles for oxygen in zirconium alloys and for fluorine in human teeth were measured by scanning the beam linearly over cross sections of the samples using the resonant proton backscattering at 4.5 MeV and the nuclear reaction F-19(p, alpha(0))O-16 at 3 MeV, respectively.