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Properties of nuclei at the third-minimum deformation

Bengtsson, Ragnar LU ; Ragnarsson, Ingemar LU ; Åberg, Sven LU ; Gyurkovich, Anna ; Sobiczewski, Adam and Pomorski, Krzysztof (1987) In Nuclear Physics, Section A 473(1). p.77-110
Abstract

Potential-energy surfaces of heavy nuclei in the Ra-Th region are calculated by the macroscopic-microscopic method using the modified oscillator potential. A rather large region of nuclei with a third minimum along the fission trajectory is found. This minimum appears at a very large quadrupole deformation, ε2 ∼ 0.9, and has a stable octupole deformation with ε3 ∼ 0.2. It is found that in addition to the deformation parameters ε2, ε3, ε4 and ε5 it is important to include also ε6. Particular attention is paid to the Th-isotopes, for which experimental evidence for the existence of a third minimum in the fission barrier has been found. Properties like the moment... (More)

Potential-energy surfaces of heavy nuclei in the Ra-Th region are calculated by the macroscopic-microscopic method using the modified oscillator potential. A rather large region of nuclei with a third minimum along the fission trajectory is found. This minimum appears at a very large quadrupole deformation, ε2 ∼ 0.9, and has a stable octupole deformation with ε3 ∼ 0.2. It is found that in addition to the deformation parameters ε2, ε3, ε4 and ε5 it is important to include also ε6. Particular attention is paid to the Th-isotopes, for which experimental evidence for the existence of a third minimum in the fission barrier has been found. Properties like the moment of inertia, the decoupling parameter and the energy splitting between positive- and negative-parity rotational bands are studied.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nuclear Physics, Section A
volume
473
issue
1
pages
34 pages
publisher
Elsevier
external identifiers
  • scopus:0002403541
ISSN
0375-9474
DOI
10.1016/0375-9474(87)90156-4
language
English
LU publication?
yes
id
e78b57e0-9f60-4eb3-be79-0db112a1a2ab
date added to LUP
2025-09-02 14:48:19
date last changed
2025-10-14 13:07:29
@article{e78b57e0-9f60-4eb3-be79-0db112a1a2ab,
  abstract     = {{<p>Potential-energy surfaces of heavy nuclei in the Ra-Th region are calculated by the macroscopic-microscopic method using the modified oscillator potential. A rather large region of nuclei with a third minimum along the fission trajectory is found. This minimum appears at a very large quadrupole deformation, ε<sub>2</sub> ∼ 0.9, and has a stable octupole deformation with ε<sub>3</sub> ∼ 0.2. It is found that in addition to the deformation parameters ε<sub>2</sub>, ε<sub>3</sub>, ε<sub>4</sub> and ε<sub>5</sub> it is important to include also ε<sub>6</sub>. Particular attention is paid to the Th-isotopes, for which experimental evidence for the existence of a third minimum in the fission barrier has been found. Properties like the moment of inertia, the decoupling parameter and the energy splitting between positive- and negative-parity rotational bands are studied.</p>}},
  author       = {{Bengtsson, Ragnar and Ragnarsson, Ingemar and Åberg, Sven and Gyurkovich, Anna and Sobiczewski, Adam and Pomorski, Krzysztof}},
  issn         = {{0375-9474}},
  language     = {{eng}},
  month        = {{10}},
  number       = {{1}},
  pages        = {{77--110}},
  publisher    = {{Elsevier}},
  series       = {{Nuclear Physics, Section A}},
  title        = {{Properties of nuclei at the third-minimum deformation}},
  url          = {{http://dx.doi.org/10.1016/0375-9474(87)90156-4}},
  doi          = {{10.1016/0375-9474(87)90156-4}},
  volume       = {{473}},
  year         = {{1987}},
}