Abstract
The electron-capture decay of Gd151 was investigated by means ofγ- andγ-γ-coincidence spectrometry, using scintillation counters. Besides the knownγ-rays of 22 kev, 154 kev, 175 kev, 244 kev and 308 kev additionalγ-transitions with energies of 107 kev and 350 kev could be assigned to the decay of Gd151.γ-γ-coincidence measurements showed the following cascade transitions: (107 kev–244 kev), (154 kev–175 kev–22 kev) and (308 kev–22 kev). TheK-conversion-coefficients of several transitions were determined by comparing theγ-intensities and the previously known conversion electron-intensities, using a direct measurement of theK-conversion-coefficient of the 175 kev-transition by a delayed coincidence-experiment as a normalization of the relative intensities. With the available information a level-scheme for Eu151 is proposed.
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Für die stete Förderung dieser Arbeit danken wir Herrn Professor H.Maier-Leibnitz.
Herrn Dr. F.Baumgärtner vom Radiochemischen Institut der Technischen Hochschule München danken wir für die zahlreichen Ratschläge bei der chemischen Trennung und die Überlassung experimenteller Hilfsmittel.
Für die Zyklotronbestrahlung der Probe danken wir Herrn Dr. H.Brückmann vom Institut für Strahlen- und Kernphysik der Universität Bonn.
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Steichele, E., Kienle, P. Der Zerfall des Gd151 . Z. Physik 175, 405–415 (1963). https://doi.org/10.1007/BF01375250
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DOI: https://doi.org/10.1007/BF01375250