The identification and confirmation of isomeric states in 254Rf and 255Rf through conversion electron detection

The neutron-deficient isotopes 254,255Rf were produced in the fusion-evaporation reaction 50Ti+206Pb at the gas-filled recoil separator TASCA. Decay properties of these nuclei were investigated by applying fast digital electronics. A search for isomeric states in both isotopes was performed by using...

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Bibliographic Details
Published in:Nuclear physics. A 2020-02, Vol.994, p.121662, Article 121662
Main Authors: Khuyagbaatar, J., Mistry, A.K., Ackermann, D., Andersson, L.-L., Block, M., Brand, H., Düllmann, Ch.E., Even, J., Heßberger, F.P., Hoffmann, J., Hübner, A., Jäger, E., Kindler, B., Krier, J., Kurz, N., Lommel, B., Schausten, B., Steiner, J., Yakushev, A., Yakusheva, V.
Format: Article
Language:English
Subjects:
Conversion electron
Digital fast data acquisition
Fusion-evaporation reaction
Isomeric state
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Summary:The neutron-deficient isotopes 254,255Rf were produced in the fusion-evaporation reaction 50Ti+206Pb at the gas-filled recoil separator TASCA. Decay properties of these nuclei were investigated by applying fast digital electronics. A search for isomeric states in both isotopes was performed by using the accompanying conversion electron emissions. Isomeric states with half-lives of 4(1) μs and >30 μs were measured for 254Rf and 255Rf, respectively, which confirm the findings at different separators. The present experimental results demonstrate the great potential of fast digital electronics for measurements of isomeric states in the heaviest nuclei, which are only producible in small quantities.
ISSN:0375-9474
DOI:10.1016/j.nuclphysa.2019.121662