New Short-Lived Isotope ^{221}U and the Mass Surface Near N=126.
In: Physical review letters, Jg. 115 (2015-12-11), Heft 24, S. 242502
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Zugriff:
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.
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New Short-Lived Isotope ^{221}U and the Mass Surface Near N=126.
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Autor/in / Beteiligte Person: | Khuyagbaatar, J ; Yakushev, A ; ChE, Düllmann ; Ackermann, D ; Andersson, LL ; Block, M ; Brand, H ; Cox, DM ; Even, J ; Forsberg, U ; Golubev, P ; Hartmann, W ; Herzberg, RD ; Heßberger, FP ; Hoffmann, J ; Hübner, A ; Jäger, E ; Jeppsson, J ; Kindler, B ; Kratz, JV ; Krier, J ; Kurz, N ; Lommel, B ; Maiti, M ; Minami, S ; Mistry, AK ; ChM, Mrosek ; Pysmenetska, I ; Rudolph, D ; Sarmiento, LG ; Schaffner, H ; Schädel, M ; Schausten, B ; Steiner, J ; De Heidenreich, TT ; Uusitalo, J ; Wegrzecki, M ; Wiehl, N ; Yakusheva, V |
Zeitschrift: | Physical review letters, Jg. 115 (2015-12-11), Heft 24, S. 242502 |
Veröffentlichung: | New York : American Physical Society, 2015 |
Medientyp: | academicJournal |
ISSN: | 1079-7114 (electronic) |
DOI: | 10.1103/PhysRevLett.115.242502 |
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