J. Gerber

Transient field measurements on32S(21+) ions in Gd at the 1s electron Bohr velocity

With the knowng-factor of the Coulomb excited first 2+-state in32S the transient magnetic field was determined for sulphur ions traversing Gd at a mean velocity of 16ν0 (ν0=c/137). The degree of polarization deduced for the dominating H-like ions, ¯p1s=0.10(3), agrees very well with that obtained at lower velocities. In addition, an upper limit of a transient electric field gradient was deduced from the particle-γ-angular correlation which is expected on theoretical grounds.

New determination of the magnetic moment of the54Fe(2 1 + ) state at 1.408 MeV

Relative to the wellknowng-factor of56Fe(21+) at 0.847 MeV, theg-factor of the54Fe(21+) state at 1.408 MeV has been remeasured employing the technique of transient magnetic fields (TF) with the ions slowed down in ferromagnetic Gd host at initial velocities of 2.5 ν0. Coulomb excitation on beams of54,56Fe was accomplished with a Si target. The value obtained,g=1.05(17), is in excellent agreement with two previous results but disagrees with the value from a TF measurement where the ions passed through ferromagnetic Fe.

Dominant ( g 9 / 2 ) 2 neutron configuration in the 4 1 + state of Zn 68 based on new g factor measurements

The g factor of the 4 + state in 68 Zn has been remeasured with improved energy resolution of the detectors used. The value obtained is consistent with the previous result of a negative g factor thus confirming the dominant 0g9/2 neutron nature of the 4 + state. In addition, the accuracy of the g factors of the 2 + , 2 + and 3 − states has been improved and their lifetimes were well reproduced. New large-scale shell model calculations based on a 56 Ni core and an 0f 5/2 1pg 9/2 model space yield a theoretical value, g(4 + ) = +0.008. Although the calculated value is small, it cannot fully explain the experimental value, g(4 + ) = 0.37(17). The magnitude of the deduced B(E2) of the 4 + and 2 + transition is, however, rather well described. These results demonstrate again the importance of g factor measurements for nuclear structure determinations due to their specific sensitivity to detailed proton and neutron components in the nuclear wave functions.

Low-level structure of Ge-70 from lifetime and g-factor measurements following alpha transfer to a Zn-66 ion beam

The

Dominant(g9/2)2neutron configuration in the41+state ofZn68based on newgfactor measurements

g

Dominant (g{sub 9/2}){sup 2} neutron configuration in the 4{sub 1}{sup +} state of {sup 68}Zn based on new g factor measurements

factor of the

Hyperfine interaction studies on swift O-ions emerging with polarized electrons from ferromagnetic layers into vacuum

{2}_{1}^{+}

Nuclear structure of the first 2{sup +} state in radioactive {sup 68}Ge based on g factor and lifetime measurements

state in

Nuclear structure of the stable even-A calcium isotopes based on new experiments and shell model calculations

^{70}\mathrm{Ge}

Experimental g factors and B ( E 2 ) values of 2 1 + , 4 1 + , 2 2 + , and 3 1 − states in Zn 64 and Zn 68 compared to shell model predictions

was remeasured using a different experimental approach. Furthermore, for the first time an experimental value (although with a large uncertainty) was obtained for the