A. Ward

ALBEGA: A Decay Spectroscopy Setup for Chemically Separated Samples

Di Nitto, A.; Yakushev, A.; Düllmann, C. E.; Khuyagbaatar, J.; Krier, J.; Ballof, J.; Bar, J.; Budzynski, T.; Cox, D. M.; Derkx, X.; Dormand, J.; Despotopulos, J. D.; Eberhardt, K.; Even, J.; Grabiec, P.; Harkness-Brennan, L.; Herzberg, R. D.; Hübner, A.; Jäger, E.; Judson, D.; Kindler, B.; Klos, H.; Kratz, J. V.; Kulawik, J.; Kurz, N.; Lens, L.; Lommel, B.; Moody, K.; Panas, A.; Prokaryn, P.; Rudolph, Dirk; Runke, J.; Rusanov, I.; Scharrer, P.; Schausten, B.; Shaughnessy, D.; Szmigiel, D.; Ward, A. J.; Wegrzecki, M. Published in: GSI Report

Online chemical adsorption studies of Hg, Tl, and Pb on SiO2 and Au surfaces in preparation for chemical investigations on Cn, Nh, and Fl at TASCA

Abstract Online gas-solid adsorption studies with single-atom quantities of Hg, Tl, and Pb, the lighter homologs of the superheavy elements (SHE) copernicium (Cn, Z=112), nihonium (Nh, Z=113), and flerovium (Fl, Z=114), were carried out using short-lived radioisotopes. The interaction with Au and SiO2 surfaces was studied and the overall chemical yield was determined. Suitable radioisotopes were produced in fusion-evaporation reactions, isolated in the gas-filled recoil separator TASCA, and flushed rapidly to an adjacent setup of two gas chromatography detector arrays covered with SiO2 (first array) and Au (second array). While Tl and Pb adsorbed on the SiO2 surface, Hg interacts only weakly and reached the Au-covered array. Our results contribute to elucidating the influence of relativistic effects on chemical properties of the heaviest elements by providing experimental data on these lighter homologs.

Recoil-alpha-fission and Recoil-alpha-alpha-fission Chains Stemming from Element 115

Rudolph, Dirk; Forsberg, Ulrika; Düllmann, C. E.; Golubev, Pavel; Heßberger, F.P.; Khuyagbaatar, J.; Kratz, J. V.; Sarmiento, Luis; Yakushev, A.; Ackermann, D.; Andersson, L.; Block, M.; Brand, H.; Cox, D.; Derkx, X.; Di Nitto, A.; Eberhardt, K.; Even, J.; Fahlander, Claes; Gates, J. M.; Gerl, J.; Gregorich, E. K.; Gross, C. J.; Herzberg, R.-D.; Jäger, E.; Kindler, B.; Krier, J.; Kojouharov, I.; Kurz, N.; Lommel, B.; Mistry, A.; Mokry, C.; Nitsche, H.; Omtvedt, J. P.; Papadakis, P.; Runke, J.; Rykaczewski, K.; Schädel, M.; Schaffner, H.; Schausten, B.; Thörle-Pospiech, P.; Torres, T.; Traut, T.; Trautmann, N.; Türler, A.; Ward, A.; Wiehl, N. Published in: GSI Report

Element 115 Studied with TASISpec

D. Rudolph1, U. Forsberg1, P. Golubev1, L.G. Sarmiento1, A. Yakushev2, L.-L. Andersson3, A. Di Nitto4, Ch.E. Dullmann2,3,4, J.M. Gates5, K.E. Gregorich5, C.J. Gross6, R.-D. Herzberg7, F.P. Hesberger2,3, J. Khuyagbaatar3, J.V. Kratz4, K. Rykaczewski6, M. Schadel2,8, S. ◦ Aberg1, D. Ackermann2, M. Block2, H. Brand2, B.G. Carlsson1, D. Cox7, X. Derkx3,4, K. Eberhardt3,4, J. Even3, C. Fahlander1, J. Gerl2, E. Jager2, B. Kindler2, J. Krier2, I. Kojouharov2, N. Kurz2, B. Lommel2, A. Mistry7, C. Mokry3,4, H. Nitsche5, J.P. Omtvedt9, P. Papadakis7, I. Ragnarsson1, J. Runke2, H. Schaffner2, B. Schausten2, P. Thorle-Pospiech3,4, T. Torres2, T. Traut4, N. Trautmann4, A. Turler10, A. Ward7, D.E. Ward1, and N. Wiehl3,4 1Lund University, Lund, Sweden; 2GSI Helmholtzzentrum fur Schwerionenforschung GmbH, Darmstadt, Germany; 3Helmholtz Institute Mainz, Mainz, Germany; 4Johannes Gutenberg-Universitat Mainz, Mainz, Germany; 5Lawrence Berkeley National Laboratory, Berkeley, USA; 6Oak Ridge National Laboratory, Oak Ridge, USA; 7University of Liverpool, Liverpool, United Kingdom; 8Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Japan; 9University of Oslo, Oslo, Norway; 10Paul Scherrer Institute and University of Bern, Villigen, Switzerland