Abstract
In the reaction of complete fusion of 48Ca-ions with a 204Pb target, a new α line, related to the decay of a new, previously unknown isotope (249No), has been detected in an experiment carried out at the SHELS separator. The α decay energy (Eα = 9129 keV) and the half-life (T1/2 = 38.1 ± 2.5 ms) are measured using the GABRIELA detector array. The SF branching ratio was estimated (bSF ≤ 0.2%).
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Funding
This work was supported by the IN2P3-JINR collaboration Agreement no. 04-63, the Russian Foundation for Basic Research (RFBR grant no. 18-52-15004), French National Research Agency (Project Nos. ANR-06-BLAN-0034-01 and ANR-12-BS05-0013). The work of M. Tezekbayeva was also supported by the Association of Young Scientists and Specialists (AYSS) of JINR, grant no. 21-502-09.
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Translated by E. Baldina
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Svirikhin, A.I., Yeremin, A.V., Zamyatin, N.I. et al. The New 249No Isotope. Phys. Part. Nuclei Lett. 18, 445–448 (2021). https://doi.org/10.1134/S1547477121040154
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DOI: https://doi.org/10.1134/S1547477121040154