| Literature DB >> 26705628 |
J Khuyagbaatar1,2, A Yakushev1,2, Ch E Düllmann1,2,3, D Ackermann2, L-L Andersson1, M Block1,2,3, H Brand2, D M Cox4, J Even1, U Forsberg5, P Golubev5, W Hartmann2, R-D Herzberg4, F P Heßberger1,2, J Hoffmann2, A Hübner2, E Jäger2, J Jeppsson5, B Kindler2, J V Kratz3, J Krier2, N Kurz2, B Lommel2, M Maiti6, S Minami2, A K Mistry4, Ch M Mrosek3, I Pysmenetska2, D Rudolph5, L G Sarmiento5, H Schaffner2, M Schädel2, B Schausten2, J Steiner2, T Torres De Heidenreich2, J Uusitalo7, M Wegrzecki8, N Wiehl1,3, V Yakusheva1.
Abstract
Two short-lived isotopes ^{221}U and ^{222}U were produced as evaporation residues in the fusion reaction ^{50}Ti+^{176}Yb at the gas-filled recoil separator TASCA. An α decay with an energy of E_{α}=9.31(5) MeV and half-life T_{1/2}=4.7(7) μs was attributed to ^{222}U. The new isotope ^{221}U was identified in α-decay chains starting with E_{α}=9.71(5) MeV and T_{1/2}=0.66(14) μs leading to known daughters. Synthesis and detection of these unstable heavy nuclei and their descendants were achieved thanks to a fast data readout system. The evolution of the N=126 shell closure and its influence on the stability of uranium isotopes are discussed within the framework of α-decay reduced width.Entities:
Year: 2015 PMID： 26705628 DOI： 10.1103/PhysRevLett.115.242502
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161