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Abstract : We have measured the hyperfine magnetic field on dilute thorium and uranium in iron metal using the ion implantation perturbed angular correlation technique. The field on thorium in iron at room temperature is — 230 ± 80 kOe and on uranium in iron — 580 ± 150 kOe. The sign and magnitude of the values suggests that the 5 f contribution to the field for uranium is small, unlike the 4 f contribution for the rare earths. Recent results for Np in nickel Heff= + 170 kOe and for Pu in iron Heff = + 620 kOe indicate that fields on actinides do not follow the trend apparent for the rare earth series.





Autor: D. Murnick E. Kaufmann

Fuente: https://hal.archives-ouvertes.fr/



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