The breaking of intrinsic reflection symmetry in nuclear ground states
(1982) In Nuclear Physics, Section A 388(3). p.452-476- Abstract
Negative-parity excited states of doubly even nuclei have earlier been attributed to vibrational excitations. This paper shows that an interpretation starting from a reflection asymmetric intrinsic state is more appropriate for certain nuclei in the radium region. Theoretical evidence for stable octupole deformation comes from a deformed shell-model calculation in which we use a single-particle potential with a realistic radial shape and a finite-range interaction for the surface energy. The octupole effect systematically improves the agreement between theoretical and experimental masses. The low-lying O+ excitations observed in experiment are compatible with the calculated collective octupole potentials. The possibility of... (More)
Negative-parity excited states of doubly even nuclei have earlier been attributed to vibrational excitations. This paper shows that an interpretation starting from a reflection asymmetric intrinsic state is more appropriate for certain nuclei in the radium region. Theoretical evidence for stable octupole deformation comes from a deformed shell-model calculation in which we use a single-particle potential with a realistic radial shape and a finite-range interaction for the surface energy. The octupole effect systematically improves the agreement between theoretical and experimental masses. The low-lying O+ excitations observed in experiment are compatible with the calculated collective octupole potentials. The possibility of obtaining further evidence from the spectroscopy of odd-mass nuclei is considered in an exactly solvable model, which shows that the smaller energy splitting observed in odd-A parity doublets mainly reflects single-particle fragmentation of the collective mode. The systematics of theoretical shell structure and experimental spectroscopy suggests the presence of other regions of octupole collectivity near the limits of stability.
(Less)
- author
- Leander, G. A. ; Sheline, R. K. ; Möller, P. LU ; Olanders, P. ; Ragnarsson, I. LU and Sierk, A. J.
- organization
- publishing date
- 1982-11-01
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Nuclear Physics, Section A
- volume
- 388
- issue
- 3
- pages
- 25 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:0000139435
- ISSN
- 0375-9474
- DOI
- 10.1016/0375-9474(82)90471-7
- language
- English
- LU publication?
- yes
- id
- 1954221e-4111-4494-8c28-3d5d6dba524a
- date added to LUP
- 2026-01-15 10:02:13
- date last changed
- 2026-01-20 10:54:15
@article{1954221e-4111-4494-8c28-3d5d6dba524a,
abstract = {{<p>Negative-parity excited states of doubly even nuclei have earlier been attributed to vibrational excitations. This paper shows that an interpretation starting from a reflection asymmetric intrinsic state is more appropriate for certain nuclei in the radium region. Theoretical evidence for stable octupole deformation comes from a deformed shell-model calculation in which we use a single-particle potential with a realistic radial shape and a finite-range interaction for the surface energy. The octupole effect systematically improves the agreement between theoretical and experimental masses. The low-lying O<sup>+</sup> excitations observed in experiment are compatible with the calculated collective octupole potentials. The possibility of obtaining further evidence from the spectroscopy of odd-mass nuclei is considered in an exactly solvable model, which shows that the smaller energy splitting observed in odd-A parity doublets mainly reflects single-particle fragmentation of the collective mode. The systematics of theoretical shell structure and experimental spectroscopy suggests the presence of other regions of octupole collectivity near the limits of stability.</p>}},
author = {{Leander, G. A. and Sheline, R. K. and Möller, P. and Olanders, P. and Ragnarsson, I. and Sierk, A. J.}},
issn = {{0375-9474}},
language = {{eng}},
month = {{11}},
number = {{3}},
pages = {{452--476}},
publisher = {{Elsevier}},
series = {{Nuclear Physics, Section A}},
title = {{The breaking of intrinsic reflection symmetry in nuclear ground states}},
url = {{http://dx.doi.org/10.1016/0375-9474(82)90471-7}},
doi = {{10.1016/0375-9474(82)90471-7}},
volume = {{388}},
year = {{1982}},
}