Third minima in actinides - do they exist?

Details Third minima in actinides - do they exist? Third minima in actinides - do they exist?

2012-03-20

arxiv.org/abs/1203.4449v1

Physics

Nuclear Physics

Nuclear Theory

5 pages, 3 figures, 02. 03. 2012 - submitted to PRL

Scientific paper

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 ($3 \div 4$ MeV) minima found previously by \'Cwiok et al. are found spurious after sufficiently general shapes are included. Shallow third wells may exist in $^{230,232}$Th, with IIIrd barriers $\le$ 200 and 330 keV (respectively). Thus, a problem of qualitative discrepancy between microscopic-macroscopic and selfconsistent predictions is resolved. Now, an understanding of experimental results on the apparent third minima in uranium becomes an issue.

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