Search for elements 119 and 120
Khuyagbaatar, J., Yakushev, A., Düllmann, C. E., Ackermann, D., Andersson, L.-L., Asai, M., Block, M., Boll, R. A., Brand, H., Cox, D. M., Dasgupta, M., Derkx, X., Di Nitto, A., Eberhardt, K., Even, J., Evers, M., Fahlander, C., Forsberg, U., Gates, J. M., . . . Yakusheva, V. (2020). Search for elements 119 and 120. Physical Review C, 102(6), Article 064602. https://doi.org/10.1103/physrevc.102.064602
Julkaistu sarjassa
Physical Review CPäivämäärä
2020Tekijänoikeudet
© 2020 American Physical Society
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.
Julkaisija
American Physical Society (APS)ISSN Hae Julkaisufoorumista
2469-9985Julkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/47292353
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This work was financially supported in part by the German BMBF (Grant No. 05P12UMFNE), the Helmholtz association (Grant No. VH-NG-723), the Helmholtz Institute Mainz, Swedish Research Council (Vetenskapsrådet VR Grants No. 2011-5253 and No. 2016-3969), the Australian Federal Government ARC (Grants No. DP170102318, No. DP170102423, and No. DP200100601), the US Department of Energy by LLNL (Grant No. DE-AC52-07NA27344), Vanderbilt University (Grant No. DE-FG05-88ER40407), and the Laboratory Directed Research and Development Program at LLNL (Grant No. 11-ERD-011). This work was cosponsored by the Office of Science, US Department of Energy (DOE), and supported under U.S. DOE Grant No. DE-AC05-00OR22725 (ORNL). 249Bk material was provided by the U.S. DOE Isotope Program. ...Lisenssi
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Fusion reaction 48Ca+249Bk leading to formation of the element Ts (Z=117)
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