Speaker
Description
The study of half-lives in the region of isotopes around A=180 is of particular importance, as nuclei in this mass region provide opportunities for investigating both fundamental and applied properties of nuclear matter. The isotopes examined in the present work are the unstable isotopes of ytterbium with A=177 and A=178, which undergo β-decay to the corresponding lutetium isobars (177,178Lu). The currently adopted half-life values of 177,178Yb originate from outdated studies, making their re-measurement using modern techniques and experimental setups necessary. Along these lines two experiments were carried out with the activation method. The first experiment was carried out at IFIN–HH, where the ROSPHERE experimental setup was employed. A proton-transfer reaction 176Yb(9Be,8 Be)177Yb was used to study the decay of 177Yb. The second experiment was conducted at IKP Köln, where the CATHEDRAL spectrometer was used to record the de-excitation γ-rays from a 2n-transfer reaction, 176Yb(18O,16O)178Yb. The results of the analysis from both experiments provide updated half-life values for the ground states of 177Yb and 178Yb and are in good agreement with the values reported in the existing literature.
- This work is supported by EURO-LABS (EU Horizon Europe Project No. 101057511) and the German Research Foundation under the grant 539757749.
† Present address: Horia Hulubei NIPNE, Strada Reactorului 30, POB MG6, RO-077125 Bucharest-Magurele, Romania.