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Global Calculation of Nuclear Shape Isomers

Moeller, Peter ; Sierk, Arnold J. ; Bengtsson, Ragnar LU ; Sagawa, Hiroyuki and Ichikawa, Takatoshi (2009) In Physical Review Letters 103(21).
Abstract
To determine which nuclei may exhibit shape isomerism, we use a well-benchmarked macroscopic-microscopic model to calculate potential-energy surfaces as functions of spheroidal (epsilon(2)), hexadecapole (epsilon(4)), and axial-asymmetry (gamma) shape coordinates for 7206 nuclei from A=31 to A=290. We analyze these and identify the deformations and energies of all minima deeper than 0.2 MeV. These minima may correspond to characteristic experimentally observable shape-isomeric states. Shape isomers mainly occur in the A=80 region, the A=100 region, and in an extended region centered around Pb-208. We compare our model to experimental results for Kr isotopes. Moreover, in a plot versus N and Z we show for each of the 7206 nuclei the... (More)
To determine which nuclei may exhibit shape isomerism, we use a well-benchmarked macroscopic-microscopic model to calculate potential-energy surfaces as functions of spheroidal (epsilon(2)), hexadecapole (epsilon(4)), and axial-asymmetry (gamma) shape coordinates for 7206 nuclei from A=31 to A=290. We analyze these and identify the deformations and energies of all minima deeper than 0.2 MeV. These minima may correspond to characteristic experimentally observable shape-isomeric states. Shape isomers mainly occur in the A=80 region, the A=100 region, and in an extended region centered around Pb-208. We compare our model to experimental results for Kr isotopes. Moreover, in a plot versus N and Z we show for each of the 7206 nuclei the calculated number of minima. The results reveal one fairly unexplored region of shape isomerism, which is experimentally accessible, namely the region northeast of Pb-208(82). (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
103
issue
21
publisher
American Physical Society
external identifiers
  • wos:000272054300012
  • scopus:70450185400
  • pmid:20366030
ISSN
1079-7114
DOI
10.1103/PhysRevLett.103.212501
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Mathematical Physics (Faculty of Technology) (011040002)
id
8a84c8f2-0582-4a45-9c9d-4aa54eb0327b (old id 1518203)
date added to LUP
2016-04-01 12:35:45
date last changed
2021-08-25 04:06:50
@article{8a84c8f2-0582-4a45-9c9d-4aa54eb0327b,
  abstract     = {To determine which nuclei may exhibit shape isomerism, we use a well-benchmarked macroscopic-microscopic model to calculate potential-energy surfaces as functions of spheroidal (epsilon(2)), hexadecapole (epsilon(4)), and axial-asymmetry (gamma) shape coordinates for 7206 nuclei from A=31 to A=290. We analyze these and identify the deformations and energies of all minima deeper than 0.2 MeV. These minima may correspond to characteristic experimentally observable shape-isomeric states. Shape isomers mainly occur in the A=80 region, the A=100 region, and in an extended region centered around Pb-208. We compare our model to experimental results for Kr isotopes. Moreover, in a plot versus N and Z we show for each of the 7206 nuclei the calculated number of minima. The results reveal one fairly unexplored region of shape isomerism, which is experimentally accessible, namely the region northeast of Pb-208(82).},
  author       = {Moeller, Peter and Sierk, Arnold J. and Bengtsson, Ragnar and Sagawa, Hiroyuki and Ichikawa, Takatoshi},
  issn         = {1079-7114},
  language     = {eng},
  number       = {21},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Global Calculation of Nuclear Shape Isomers},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.103.212501},
  doi          = {10.1103/PhysRevLett.103.212501},
  volume       = {103},
  year         = {2009},
}