Abstract
The level structure of Ge74 has been investigated at the Karlsruhe research reactor using thermal neutron capture in Ge73. Neutrons were monochromized by Bragg reflection from a lead single crystal. The target was Ge73 enriched to 86.1%. Precision measurements of the capture gamma-ray spectrum have been performed over the whole energy range by means of a 4 cm2×0.5 cm lithium-drifted germanium detector. 148 gamma transitions have been observed. Considerable aid in analysis of the level structure is provided by double and triple coincidence measurements with 4″ ∅ × 5″ NaI(Tl) detectors. Data were processed using the Karlsruhe Multiple Input Data Acquisition System (MIDAS). A level scheme of Ge74 is proposed involving 38 excited states in the energy range from 0 to 4400 keV. The neutron binding energy of Ge74 is determined to be 10202±10 keV.
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