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23 April 2024

» arxiv » 1502.3030

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Recoil-alpha-fission and recoil-alpha-alpha-fission events observed in the reaction Ca-48 + Am-243
U. Forsberg ; D. Rudolph ; L.-L. Andersson ; A. Di Nitto ; Ch.E. Düllmann ; J.M. Gates ; P. Golubev ; K.E. Gregorich ; C.J. Gross ; R.-D. Herzberg ; F.P. Hessberger ; J. Khuyagbaatar ; J.V. Kratz ; K. Rykaczewski ; L.G. Sarmiento ; M. Schädel ; A. Yakushev ; S. Åberg ; D. Ackermann ; M. Block ; H. Brand ; B.G. Carlsson ; D. Cox ; X. Derkx ; J. Dobaczewski ; K. Eberhardt ; J. Even ; C. Fahlander ; J. Gerl ; E. Jäger ; B. Kindler ; J. Krier ; I. Kojouharov ; N. Kurz ; B. Lommel ; A. Mistry ; C. Mokry ; W. Nazarewicz ; H. Nitsche ; J.P. Omtvedt ; P. Papadakis ; I. Ragnarsson ; J. Runke ; H. Schaffner ; B. Schausten ; Y. Shi ; P. Thörle-Pospiech ; T. Torres ; T. Traut ; N. Trautmann ; A. Türler ; A. Ward ; D.E. Ward ; N. Wiehl ;
Date:	10 Feb 2015
Abstract:	Products of the fusion-evaporation reaction Ca-48 + Am-243 were studied with the TASISpec set-up at the gas-filled separator TASCA at the GSI Helmholtzzentrum f"ur Schwerionenforschung. Amongst the detected thirty correlated alpha-decay chains associated with the production of element Z=115, two recoil-alpha-fission and five recoil-alpha-alpha-fission events were observed. The latter are similar to four such events reported from experiments performed at the Dubna gas-filled separator. Contrary to their interpretation, we propose an alternative view, namely to assign eight of these eleven decay chains of recoil-alpha(-alpha)-fission type to start from the 3n-evaporation channel 115-288. The other three decay chains remain viable candidates for the 2n-evaporation channel 115-289.
Source:	arXiv, 1502.3030
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