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Abstract. The g-factors of the four lowest states of the ground state rotational band of ~SSDy have been determined as g(21~)= +0.362(23), g(4+)= +0.340(20), g (6 +) = + 0.207 (36) and g (8 i +) = + 0.21 (11). The g-factors of the 2 + and 4 + states were measured by the IPAC method with radioactive samples of 2.4 h 158Er in external magnetic fields. To investigate the higher states, for the first time an on-line 7-7 IPAC experiment was performed with the reaction 156Gd(~, 2n)lSSDy by use of the static hyperfine field of DyGd.

The gyromagnetic ratios and the half-lifes of the 141 keV and 181 keV states of 99Tc have been remeasured. The results, g(141 keV)= + 1.280(44); g(181 keV)= + 1.446(20) and Tin(141 keV)=0.205(4) ns; Tv2(181 keV)= 3.44(3) ns are in only fair agreement with prior published data but more precise. They confirm that both states are members of the ground state core vibration multiplet. The hyperfine field of TcFe has been determined as Bl~K(TcFe)=30.42(30) T; B~~ T

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