Examination of the existence of third, hyperdeformed minima in actinide nuclei
Abstract
We study the existence of third, hyperdeformed minima in a number of even-even Th, U, and Pu nuclei using the Woods-Saxon microscopic-macroscopic model that very well reproduces first and second minima and fission barriers in actinides. Deep (3-4 MeV) minima found previously by Ćwiok are found spurious after sufficiently general shapes are included. Shallow third wells may exist in 230,232Th, with IIIrd barriers ⩽ 200 and 330 keV (respectively). Thus, a problem of qualitative discrepancy between microscopic-macroscopic and self-consistent predictions is resolved. Now, an understanding of experimental results on the apparent third minima in uranium becomes an issue.
- Publication:
-
Physical Review C
- Pub Date:
- June 2012
- DOI:
- 10.1103/PhysRevC.85.061302
- arXiv:
- arXiv:1203.4449
- Bibcode:
- 2012PhRvC..85f1302K
- Keywords:
-
- 25.85.Ca;
- 21.10.Gv;
- 21.60.-n;
- 27.90.+b;
- Spontaneous fission;
- Mass and neutron distributions;
- Nuclear structure models and methods;
- 220<
- =A;
- Nuclear Theory
- E-Print:
- 5 pages, 3 figures, 02. 03. 2012 - submitted to PRL