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Fission barrier of superheavy nuclei and persistence of shell effects at high spin: cases of 254No and 220Th.
Henning, Greg; Khoo, T L; Lopez-Martens, A; Seweryniak, D; Alcorta, M; Asai, M; Back, B B; Bertone, P F; Boilley, D; Carpenter, M P; Chiara, C J; Chowdhury, P; Gall, B; Greenlees, P T; Gürdal, G; Hauschild, K; Heinz, A; Hoffman, C R; Janssens, R V F; Karpov, A V; Kay, B P; Kondev, F G; Lakshmi, S; Lauritsen, T; Lister, C J; McCutchan, E A; Nair, C; Piot, J; Potterveld, D; Reiter, P; Rogers, A M; Rowley, N; Zhu, S.
Afiliación
  • Henning G; CSNSM, IN2P3-CNRS, and Université Paris Sud, Bat. 104-108, F-91405 Orsay, France and Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Khoo TL; Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Lopez-Martens A; CSNSM, IN2P3-CNRS, and Université Paris Sud, Bat. 104-108, F-91405 Orsay, France.
  • Seweryniak D; Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Alcorta M; Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Asai M; Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan.
  • Back BB; Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Bertone PF; Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Boilley D; GANIL, CEA-DSM, and IN2P3-CNRS, B.P. 55027, F-14076 Caen Cedex, France and Université de Caen Basse-Normandie, F-14032 Caen Cedex, France.
  • Carpenter MP; Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Chiara CJ; Argonne National Laboratory, Argonne, Illinois 60439, USA and University of Maryland, College Park, Maryland 20742, USA.
  • Chowdhury P; University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA.
  • Gall B; Université de Strasbourg, IPHC, 23 rue du Loess, 67037 Strasbourg, France and CNRS, UMR7178, 67037 Strasbourg, France.
  • Greenlees PT; Department of Physics, University of Jyväskylä, FI-40014 Jyväskylä, Finland.
  • Gürdal G; Argonne National Laboratory, Argonne, Illinois 60439, USA and DePaul University, Chicago, Illinois 60604, USA.
  • Hauschild K; CSNSM, IN2P3-CNRS, and Université Paris Sud, Bat. 104-108, F-91405 Orsay, France.
  • Heinz A; Fundamental Fysik, Chalmers Tekniska Hogskola, 412 96 Göteborg, Sweden and WNSL, Yale University, New Haven, Connecticut 06511, USA.
  • Hoffman CR; Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Janssens RV; Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Karpov AV; Flerov Laboratory of Nuclear Reactions, JINR, Dubna, 141980, Russia.
  • Kay BP; Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Kondev FG; Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Lakshmi S; University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA.
  • Lauritsen T; Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Lister CJ; University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA.
  • McCutchan EA; Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Nair C; Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Piot J; Université de Strasbourg, IPHC, 23 rue du Loess, 67037 Strasbourg, France and CNRS, UMR7178, 67037 Strasbourg, France.
  • Potterveld D; Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Reiter P; Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany.
  • Rogers AM; Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Rowley N; IPN, CNRS/IN2P3, Université Paris-Sud 11, F-91406 Orsay Cedex, France.
  • Zhu S; Argonne National Laboratory, Argonne, Illinois 60439, USA.
Phys Rev Lett ; 113(26): 262505, 2014 Dec 31.
Article en En | MEDLINE | ID: mdl-25615317
ABSTRACT
We report on the first measurement of the fission barrier height in a heavy shell-stabilized nucleus. The fission barrier height of 254No is measured to be Bf=6.0±0.5 MeV at spin 15ℏ and, by extrapolation, Bf=6.6±0.9 MeV at spin 0ℏ. This information is deduced from the measured distribution of entry points in the excitation energy versus spin plane. The same measurement is performed for 220Th and only a lower limit of the fission barrier height can be determined Bf(I)>8 MeV. Comparisons with theoretical fission barriers test theories that predict properties of superheavy elements.
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Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2014 Tipo del documento: Article País de afiliación: Estados Unidos
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Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2014 Tipo del documento: Article País de afiliación: Estados Unidos