Abstract
Theγ-spectrum of a neutronactivated probe of natural Er2O3 revealed an additional peak at 55 keV, which was attributed to the characteristicK-Röntgenstrahlung from the decay of Er165 by measurement of its half-life in a NaJ-wellcrystal. The activation cross section for thermal reactor neutrons for Er164 (n, γ) Er165 has been determined to σ A =20±7 barn. The averaged conversion coefficient of the 111, 116 and 124 keV γ-rays from Er171→Tm171 have been remeasured with scintillation counter equipment.
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D 7 (gekürzt).
Herrn Professor Dr. A.Flammersfeld danke ich herzlich für die Anregung und ständige Förderung dieser Arbeit, Herrn Professor Dr. E.Bagge für die Bestrahlung einiger Präparate im Geesthachter Reaktor. Dem Niedersächsischen Kultusministerium und dem Bundesatomministerium gebührt Dank für zusätzliche Mittel.
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Schöneberg, R. Der Zerfall von Er171 und Er165 . Z. Physik 175, 54–62 (1963). https://doi.org/10.1007/BF01375395
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DOI: https://doi.org/10.1007/BF01375395