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1.	Khuyagbaatar, J., et al. (author) Search for elements 119 and 120 2020 In: Physical Review C. - 2469-9985. ; 102:6 Journal article (peer-reviewed)abstract A search for production of the superheavy elements with atomic numbers 119 and 120 was performed in the 50Ti+249Bk and 50Ti+249Cf fusion-evaporation reactions, respectively, at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. Over four months of irradiation, the 249Bk target partially decayed into 249Cf, which allowed for a simultaneous search for both elements. Neither was detected at cross-section sensitivity levels of 65 and 200 fb for the 50Ti+249Bk and 50Ti+249Cf reactions, respectively, at a midtarget beam energy of Elab = 281.5 MeV. The nonobservation of elements 119 and 120 is discussed within the concept of fusion-evaporation reactions including various theoretical predictions on the fission-barrier heights of superheavy nuclei in the region of the island of stability.

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Author/Editor: Asai, M. (1); Dasgupta, M. (1); Golubev, P. (1); Kurz, N (1); Lang, R (1); Hartmann, W (1); show more...; Cox, D. M. (1); Papadakis, P. (1); Uusitalo, J. (1); Hoffmann, J (1); Lahiri, S (1); Rudolph, D. (1); Kratz, J. V. (1); Andersson, L-L (1); Herzberg, R-D (1); Ackermann, D. (1); Eberhardt, K. (1); Even, J. (1); Khuyagbaatar, J. (1); Krier, J. (1); Schausten, B. (1); Semchenkov, A. (1); Yakushev, A. (1); Lommel, B. (1); Kindler, B. (1); Steiner, J. (1); Nitsche, H. (1); Heßberger, F. P. (1); Fahlander, C. (1); Sarmiento Pico, Luis (1); Brand, H (1); Di Nitto, A. (1); Block, M (1); Mistry, A. K. (1); Renisch, D. (1); Minami, S (1); Maiti, M. (1); Tinschert, K. (1); Forsberg, U. (1); Düllmann, Ch.E. (1); Gates, J.M. (1); Jäger, E. (1); Mokry, C. (1); Runke, J. (1); Thörle-Pospiech, P. (1); Trautmann, N. (1); Schädel, M. (1); Shaughnessy, D. A. (1); Derkx, X. (1); Hübner, A. (1); show less...

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