Discovery of new isotopes plutonium-224 and uranium-220

该项目旨在发现新的同位素钚-224和铀-220。这些同位素将允许测量N = 126壳封闭的稳健性。在伊瓦斯基拉大学的加速器实验室进行了一项实验，其中使用硫-32离子束和由铂-196组成的靶进行聚变-蒸发反应。实验使用RITU充气反冲分离器将蒸发残留物从散射光束中分离出来，并将其传输到焦平面。在焦平面上，使用包括硅和高纯锗探测器在内的一套探测器研究了聚变蒸发产物的放射性衰变。将使用标准反冲衰变标记技术分析这些数据，以便将未知的钚224和铀220衰变与已知的钍216 α衰变联系起来。

This project aims to make the discovery of the new isotopes plutonium-224 and uranium-220. These isotopes will permit a measure of the robustness of the N = 126 shell closure. An experiment was performed at the Accelerator Laboratory of the University of Jyvaskyla in which fusion-evaporation reactions were performed using a beam of sulphur-32 ions and a target composed of platinum-196. The experiment used the RITU gas-filled recoil separator to isolate the evaporation residues from the scattered beam and to transport them to the focal plane. At the focal plane, the radioactive decay of the fusion-evaporation products was studied using a suite of detectors including silicon and high-purity germanium detectors. The data will be analysed using standard recoil decay tagging techniques to correlate the decay of the unknown plutonium-224 and uranium-220 decays with the known alpha-decay of thorium-216.