Hyperfine interaction studies by nuclear orientation and NMR/ON on-line to an electromagnetic isotope separator - experiences with the system FOLBIS

82Br was implanted into iron at T < 0.2 K and at room temperature with different doses. Low-dose samples were prepared by use of a specially developed negative surface-ionization source. In all cases nuclear magnetic resonance of oriented 82Br was observed. For low-dose room-temperature implantation, the resonance signal consists of a main line with a width of only 0.59(6) MHz at center frequency ν1 = 201.95(3) MHz for Bext = 81.1 mT, and a satellite of smaller amplitude and similar width at ν2 = 201.09(6) MHz. For low-dose implantation at T < 0.2 K, a line with normal width of 1.6(2) MHz at ν1 = 202.07(6) MHz for Bext = 80.7 mT, and a background line of width 6.6(1.2) MHz and center ν2 = 199.4(6) MHz were observed. Nuclear orientation data interpreted in a two-fields model indicate that the fraction of nuclei in NMR field sites is larger implantation at T < 0.2 K than after implantation at room temperature. From nuclear orientation data of 233Pa in zinc after implantation at T < 0.2 K, an effective electric interaction frequency νQ = +99(20) MHz is derived. The frequency gets smaller through annealing at 290 K. (orig.)