SOFT-LANDING ION DEPOSITION OF ISOLATED RADIOACTIVE PROBE ATOMS ON SURFACES - A NOVEL METHOD

We present a method to deposit a wide range of radioactive probe atoms on surfaces, without introducing lattice damage or contaminating the surface with other elements or isotopes. In this method, the probe ato ms are mass separated using an isotope separator, decelerated to 5 eV, and directly deposited on the surface. The method allows for performi ng hyperfine interactions experiments using trace amounts of radioacti ve probes located at surfaces and interfaces. The characteristics of t he deposition method were studied by performing perturbed angular corr elation experiments on the system In on Cu(17,1,1). The results are in agreement with molecular dynamics simulations of the deposition proce ss. The potential of this novel technique is briefly discussed.