Advanced

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)
Please use this url to cite or link to this publication:
author
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
ISSN
1079-7114
DOI
10.1103/PhysRevLett.103.212501
language
English
LU publication?
yes
id
8a84c8f2-0582-4a45-9c9d-4aa54eb0327b (old id 1518203)
date added to LUP
2010-01-13 11:10:38
date last changed
2017-11-19 03:39:57
@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},
  volume       = {103},
  year         = {2009},
}