Jacklyn M Gates

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The electron shell structure of superheavy elements, i.e., elements with atomic number Z ≥ 104, is influenced by strong relativistic effects caused by the high Z. Early atomic calculations on element 112 (copernicium, Cn) and element 114 (flerovium, Fl) having closed and quasi-closed electron shell configurations of 6d(10)7s(2) and 6d(10)7s(2)7p1/2(2),(More)
A high-resolution α, x-ray, and γ-ray coincidence spectroscopy experiment was conducted at the GSI Helmholtzzentrum für Schwerionenforschung. Thirty correlated α-decay chains were detected following the fusion-evaporation reaction 48Ca + 243Am. The observations are consistent with previous assignments of similar decay chains to originate from element Z=115.(More)
The fusion-evaporation reaction 244Pu(48Ca,3-4n){288,289}114 was studied at the new gas-filled recoil separator TASCA. Thirteen correlated decay chains were observed and assigned to the production and decay of {288,289}114. At a compound nucleus excitation energy of E{*}=39.8-43.9  MeV, the 4n evaporation channel cross section was 9.8{-3.1}{+3.9}  pb. At(More)
Two isomers decaying by electromagnetic transitions with half-lives of 4.7(1.1) and 247(73) μs have been discovered in the heavy ^{254}Rf nucleus. The observation of the shorter-lived isomer was made possible by a novel application of a digital data acquisition system. The isomers were interpreted as the K^{π}=8^{-}, ν^{2}(7/2^{+}[624],9/2^{-}[734])(More)
A. Gorshkov, J.M. Gates, R. Graeger, A. Türler, A. Yakushev, D. Ackermann, W. Brüchle, Ch.E. Düllmann, H.G. Essel, E. Jäger, J. Khuyagbaatar, I. Kojouharov, J. Krier, N. Kurz, M. Schädel, B. Schausten, E. Schimpf, J. Dvorak, L.-L. Andersson, D. Rudolph, M. Wegrzecki TU Munich, Garching, Germany; GSI, Darmstadt, Germany; LBNL, Berkeley, CA, U.S.A; University(More)
M. Schädel, D. Ackermann, L.-L. Andersson, J. Ballof, M. Block, R.A. Buda, W. Brüchle, I. Dragojevi , Ch.E. Düllmann, J. Dvorak, K. Eberhardt, J. Even, J.M. Gates, J. Gerl, A. Gorshkov, P. Golubev, R. Graeger, K.E. Gregorich, E. Gromm, W. Hartmann, F.P. Heßberger, D . Hild, R. Hoischen, A. Hübner, E. Jäger, J. Khuyagbaatar, B. Kindler, I. Kojouharov, J.V.(More)
The lightest isotope of Bh was produced in the new 209Bi(52Cr,n)260Bh reaction at the Lawrence Berkeley National Laboratory's 88-Inch Cyclotron. Positive identification was made by observation of eight correlated alpha particle decay chains in the focal plane detector of the Berkeley Gas-Filled Separator. 260Bh decays with a 35(-9)(+19) ms half-life by(More)