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Notes: Abstract Using an atomic beam magnetic resonance apparatus the nuclear magnetic dipole momentμ I of the stable isotope Au197 was measured directly with the doublet method. The result isμ I(Au197)=0.143491 (9)μ n, uncorrected for atomic diamagnetism. Further hyperfine structure measurements were performed in the ground states of K39, Ag107, Ag109 and Au197 with the following results:Δv(K39)=461.719723 (38) MHzΔv(Ag107)=1712.512111 (18) MHzΔv(Ag109)=1976.932075 (17) MHzΔv(Au197)=6099.320184 (13) MHzg J(Ag107)/g J(K39)=1.0000260 (20)g J(Au197)/g J(K39)=1.0005076 (20).

Notes: Abstract Theg J-factors of Li6, Li7, Na23, Rb85, Rb87 and Cs133 in their2 S 1/2 ground states have been measured relative to theg J-factor of K39 with a precision of a few parts in 107 using the atomic beam magnetic resonance method.

Notes: Abstract The hyperfine structure (hfs) of the metastable atomic states 3d64s6 D 1/2, 3/2, 5/2, 7/2, 9/2 of55Mn was measured using theABMR- LIRF method (atomicbeammagneticresonance, detected bylaserinducedresonancefluorescence). The hfs constantsA andB, corrected for second order hfs perturbations, could be derived from these measurements. The theoretical interpretation of these correctedA- andB-factors was performed in the intermediate coupling scheme taking into account the configurations 3d 54s 2, 3d 64s and 3d 7. Examining the influence of the composition of the eigenvectors on the hfs parameters $$\left\langle {r^{ - 3} } \right\rangle ^{k_s k_l } $$ it was found, that for the configuration 3d 64s the two-body magnetic interaction should be considered in the calculation of the eigenvectors. Investigating second order electrostatic configuration interactions and relativistic effects and using calculated relativistic correction factors we obtained for the nuclear quadrupole moment of the nucleus55Mn a value ofQ=0.33(1) barn, which is not perturbed by a shielding or antishielding Sternheimer factor. The following hfs constants have been obtained: $$\begin{gathered} A\left( {{1 \mathord{\left/ {\vphantom {1 2}} \right. \kern-\nulldelimiterspace} 2}} \right) = 882.056\left( {12} \right)MHz \hfill \\ A\left( {{3 \mathord{\left/ {\vphantom {3 2}} \right. \kern-\nulldelimiterspace} 2}} \right) = 469.391\left( 7 \right)MHzB\left( {{3 \mathord{\left/ {\vphantom {3 2}} \right. \kern-\nulldelimiterspace} 2}} \right) = - 65.091\left( {50} \right)MHz \hfill \\ A\left( {{5 \mathord{\left/ {\vphantom {5 2}} \right. \kern-\nulldelimiterspace} 2}} \right) = 436.715\left( 3 \right)MHzB\left( {{5 \mathord{\left/ {\vphantom {5 2}} \right. \kern-\nulldelimiterspace} 2}} \right) = - 46.769\left( {30} \right)MHz \hfill \\ A\left( {{7 \mathord{\left/ {\vphantom {7 2}} \right. \kern-\nulldelimiterspace} 2}} \right) = 458.930\left( 3 \right)MHzB\left( {{7 \mathord{\left/ {\vphantom {7 2}} \right. \kern-\nulldelimiterspace} 2}} \right) = 21.701\left( {40} \right)MHz \hfill \\ A\left( {{9 \mathord{\left/ {\vphantom {9 2}} \right. \kern-\nulldelimiterspace} 2}} \right) = 510.308\left( 8 \right)MHzB\left( {{9 \mathord{\left/ {\vphantom {9 2}} \right. \kern-\nulldelimiterspace} 2}} \right) = 132.200\left( {120} \right)MHz \hfill \\ \end{gathered} $$

Notes: Abstract Using a newly built atomic beam magnetic resonance apparatus the Zeeman effect of the5 D ground state multiplet of Fe56 has been studied. From the measurements we determine theg j -factor of the5 D 4 state to be 1.50020 (3).

Notes: Abstract The hyperfine structure of the 4f 13 6s 2 2 F 7/2 ground state of Tm169 has been studied with the atomic beam magnetic resonance method. By measuring strongly field-dependent transitions in external magnetic fields between 2200 and 3000 Gauss the interaction between the nuclear magnetic dipole momentμ I and the external field was determined. These measurements yielded a direct value forμ I independent of the electronic properties of the Tm-atom. The results are:μ I=− 0.2310 (15)μ n (diamagnetically corrected), magnetic dipole interaction constanta=− 374.137661(3) Mc/sec andg J(4f 13 6s 2 2 F 7/2)=1.141189 (3).