Measurement of the magnetic dipole moment of the 57 keV state of143Pr by time-differential perturbed angular correlation technique |
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| Authors: | G Netz W Prieske H Daum E Gerdau V Lakshminarayana P Herzog |
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| Institution: | (1) Institut für Experimentalphysik der Universität Hamburg, Hamburg, Germany;(2) Institut für Strahlen- und Kernphysik der Universität Bonn, Bonn, Germany;(3) Present address: Nuclear Physics Department Andhra University, India |
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| Abstract: | The magnetic dipole interaction of the 57 keV state of143Pr in an environment of metallic cerium and in an aqueous solution of Ce(NO3)3 has been investigated by time-differential perturbed angular correlation experiments. The measurements were performed in external magnetic fields between 0.94 T and 2.24 T and at temperatures between 77 K and 1200 K. From the temperature dependence of the observed spin rotation the ionicity of the Pr ion is determined as Pr4+ in the Ce(NO3)3 and as Pr3+ in Ce metal in the intermediate nuclear state. The magnetic dipole moment of the 57 keV state is derived as  = +(3.4±0.1)K. From the room temperature relaxation constants  2 = (0.19±0.03)109s–1 for Ce(NO3)3 and 2= (0.07±0.02)109s–1 for Ce metal the correlation times 
J
= (3.8±0.7)10–13s and
J
= (1.4±0.4)10–13s respectively are deduced. The angular correlation coefficientA
2=+0.17±0.02 is in good agreement with the result of a decoupling experiment. |
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