Octupole Vibration in Superdeformed<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow><mml:mmultiscripts><mml:mi mathvariant="normal">D</mml:mi><mml:mprescripts/><mml:mn mathvariant="normal">66</mml:mn><mml:mn mathvariant="normal">152</mml:mn></mml:mmultiscripts><mml:mi mathvariant="normal">y</mml:mi></mml:mrow><mml:mn>86</mml:mn></mml:msub></mml:math>

Lauritsen, T.; Janssens, R. V. F.; Carpenter, M. P.; Fallon, P.; Herskind, B.; Jenkins, D. G.; Khoo, T. L.; Kondev, F. G.; Лопез-Мартенс, А.; Macchiavelli, A. O.; Ward, D. R.; Saleem, K. Abu; Ahmad, I.; Clark, R. M.; Cromaz, M.; Døssing, T.; Heinz, A.; Korichi, A.; Lane, G. J.; Lister, C. J.; Seweryniak, D.

doi:10.1103/physrevlett.89.282501

Cited by 36 publications

(5 citation statements)

References 45 publications

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“…It shows a rather constant excitation routhians in a wide range of ω rot = 0 ∼ 0.7 MeV. Later in 2002, its octupole character has been confirmed by the measurement of the interband transitions and the spin identification [62,63]. The ω rot -dependence of the routhian well agrees with the theoretical prediction.…”

Section: Octupole Vibrations Withsupporting

confidence: 72%

Quantal rotation and its coupling to intrinsic motion in nuclei

et al. 2016

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Abstract. Symmetry breaking is an importance concept in nuclear physics and other fields of physics. Self-consistent coupling between the mean-field potential and the single-particle motion is a key ingredient in the unified model of Bohr and Mottelson, which could lead to a deformed nucleus as a consequence of spontaneous breaking of the rotational symmetry. Some remarks on the finite-size quantum effects are given. In finite nuclei, the deformation inevitably introduces the rotation as a symmetry-restoring collective motion (Anderson-Nambu-Goldstone mode), and the rotation affects the intrinsic motion. In order to investigate the interplay between the rotational and intrinsic motions in a variety of collective phenomena, we use the cranking prescription together with the quasiparticle random phase approximation. At low spin, the coupling effect can be seen in the generalized intensity relation. A feasible quantization of the cranking model is presented, which provides a microscopic approach to the higher-order intensity relation. At high spin, the semiclassical cranking prescription works well. We discuss properties of collective vibrational motions under rapid rotation and/or large deformation. The superdeformed shell structure plays a key role in emergence of a new soft mode which could lead to instability toward the K π = 1 − octupole shape. A wobbling mode of excitation, which is a clear signature of the triaxiality, is discussed in terms of a microscopic point of view. A crucial role played by the quasiparticle alignment is presented.

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Section: Octupole Vibrations Withsupporting

confidence: 72%

Quantal rotation and its coupling to intrinsic motion in nuclei

et al. 2016

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“…In fact, various mean-field calculations [7][8][9] and quasiparticle random phase approximation (RPA) [10,11] on the basis of the rotating mean field (cranked shell model) indicated that SD nuclei are very soft against both the axial and nonaxial octupole deformations. Thus, low-frequency octupole vibrations have been predicted to appear near the SD yrast lines [12], and recently discovered in experiments for heavy SD nuclei in the Hg-Pb region [13], and also in 152 Dy [14].…”

Section: Introductionmentioning

confidence: 79%

Mixed representation RPA calculation for octupole excitations on superdeformed states in the 40Ca and neutron-rich sulfur regions

Inakura¹,

Imagawa²,

Hashimoto³

et al. 2006

Nuclear Physics A

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By means of the mixed representation RPA based on the Skyrme-Hartree-Fock mean field, we investigate low-frequency octupole excitations built on the superdeformed (SD) states in the N = Z nuclei around 40 Ca and the neutron-rich Sulfur isotopes. The RPA calculation is carried out fully self-consistently on the threedimensional Cartesian mesh in a box, and yields a number of low-frequency octupole vibrations built on the SD states in 32 S, 36 Ar, 40 Ca and 44 Ti. In particular, a strongly collective K π = 1 − octupole vibration is suggested to appear on top of the SD state in 40 Ca. For 48,50 S close to the neutron drip line, we find that the low-lying state created by the excitation of a single neutron from a loosely bound low Ω level to a high Ω resonance level acquires an extremely strong octupole transition strength due to the spatially very extended structure of the particle-hole wave functions.In the above expressions, the charge-exchange t 3 = ±1 components are included for completeness, although they do not contribute to the excitation modes considered in this paper.

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“…Two years later an experiment using the same beam and target but now with TESSA3 revealed the main discrete band [33] associated with the ridge structure as shown in figure 5. Further experiments both at Daresbury Laboratory and elsewhere have revealed a rich spectroscopic world in the superdeformed minimum of 152 Dy, see [35,[41][42][43][44] and references therein. included, this pattern is diluted but a fairly regular scheme of gaps still persists.…”

Section: The Discovery Of High-spin Nuclear Superdeformation and Iden...mentioning

confidence: 99%

High resolution gamma-ray spectroscopy and the fascinating angular momentum realm of the atomic nucleus

2016

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In 1974 Aage Bohr and Ben Mottelson predicted the different 'phases' that may be expected in deformed nuclei as a function of increasing angular momentum and excitation energy all the way up to the fission limit. While admitting their picture was highly conjectural they confidently stated '...with the ingenious experimental approaches that are being developed, we may look forward with excitement to the detailed spectroscopic studies that will illuminate the behaviour of the spinning quantised nucleus'. High resolution gamma-ray spectroscopy has indeed been a major tool in studying the structure of atomic nuclei and has witnessed numerous significant advances over the last four decades. This article will select highlights from investigations at the Niels Bohr Institute, Denmark, and Daresbury Laboratory, UK, in the late 1970s and early 1980s, some of which have continued at other national laboratories in Europe and the USA to the present day. These studies illustrate the remarkable diversity of phenomena and symmetries exhibited by nuclei in the angular momentum-excitation energy plane that continue to surprise and fascinate scientists.

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Octupole Vibration in SuperdeformedD66152y86

Cited by 36 publications

References 45 publications

Quantal rotation and its coupling to intrinsic motion in nuclei

Quantal rotation and its coupling to intrinsic motion in nuclei

Mixed representation RPA calculation for octupole excitations on superdeformed states in the 40Ca and neutron-rich sulfur regions

High resolution gamma-ray spectroscopy and the fascinating angular momentum realm of the atomic nucleus

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