Fission barrier of superheavy nuclei and persistence of shell effects at high spin: Cases of No 254 and Th 220

Greg Henning, T. L. Khoo, A. Lopez-Martens, D. Seweryniak, M. Alcorta, M. Asai, B. B. Back, P. F. Bertone, D. Boilley, M. P. Carpenter, C. J. Chiara, P. Chowdhury, B. Gall, P. T. Greenlees, G. Gürdal, K. Hauschild, A. Heinz, C. R. Hoffman, R. V.F. Janssens, A. V. KarpovB. P. Kay, F. G. Kondev, S. Lakshmi, T. Lauritsen, C. J. Lister, E. A. McCutchan, C. Nair, J. Piot, D. Potterveld, P. Reiter, A. M. Rogers, N. Rowley, S. Zhu

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

We report on the first measurement of the fission barrier height in a heavy shell-stabilized nucleus. The fission barrier height of No254 is measured to be Bf=6.0±0.5 MeV at spin 15 and, by extrapolation, Bf=6.6±0.9 MeV at spin 0. This information is deduced from the measured distribution of entry points in the excitation energy versus spin plane. The same measurement is performed for Th220 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.

Original languageEnglish
Article number262505
JournalPhysical review letters
Volume113
Issue number26
DOIs
Publication statusPublished - Dec 30 2014

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Fission barrier of superheavy nuclei and persistence of shell effects at high spin: Cases of No 254 and Th 220'. Together they form a unique fingerprint.

Cite this