Untersuchung der Gammastrahlung aus der unelastischen Streuung von 2,75 MeV-Neutronen an203Tl und205Tl
1981
γ-spectra from the (n, n′ γ) reaction of 2.75 MeV neutrons of natural Tl and enriched203Tl were measured with Ge(Li) detectors. By means of these measurements about 120γ-lines could be assigned to either of the two isotopes. About half of the lines — however accounting for more than 80% of the totalγ-intensity — could be incorporated into the respective decay schemes, which could be extended in this way. Additionally, for a number of levels already known more accurate level energies could be determined. Comparison of the results with Hauser-Feshbach calculations leads to discrepancies which cannot be removed completely by variation of the model parameters within acceptable limits.
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