Direct Decay from the Superdeformed Band to the Yrast Line in D66152y86

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

doi:10.1103/physrevlett.88.042501

Cited by 64 publications

(26 citation statements)

References 32 publications

(38 reference statements)

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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: 77%

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: 77%

Quantal rotation and its coupling to intrinsic motion in nuclei

et al. 2016

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“…We first investigate the yrast superdeformed band of the 152 Dy nucleus, which has been identified as a first high-spin superdeformed band [17] in the A ≈ 150 region and the spin-assignment has been given afterward [49]. In the present work, we generate the cranked mean-field states employed for the projected configuration-mixing by choosing four rotational frequencies, ω rot = 0.30, 0.45, 0.60, 0.75 MeV, which roughly cover the range of the observed rotational band in 152 Dy.…”

Section: B Superdeformed Band In 152 Dymentioning

confidence: 99%

“…) moments of inertia calculated by the projection Mixed ω rot =0.10 ω rot =0.23 ω rot =0.36 ω rot =0 49. …”

mentioning

confidence: 99%

Importance of multicranked configuration mixing for angular-momentum-projection calculations: Study of superdeformed rotational bands in Dy152 and Hg194

2019

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Recently we have investigated an effective method of multicranked configuration-mixing for angular-momentum-projection calculation, where several cranked mean-field states are coupled after projection: The basic idea was originally proposed by Peierls and Thouless more than fifty years ago. With this method a good description of the rotational band has been achieved in a fully microscopic manner. In the present work, we apply the method to the high-spin superdeformed band, for which long rotational sequence is observed, and study how the good description is obtained for the rotational spectrum as well as the J (1) and J (2) moments of inertia as functions of angular momentum. The Gogny D1S force is employed as an effective interaction, and the yrast superdeformed bands in 152 Dy and 194 Hg are taken as typical examples in the A ≈ 150 and A ≈ 190 regions, respectively. The effect of pairing correlations is examined by the variation after particle-number projection approach to understand the different behaviors of J (2) moments of inertia observed in these two nuclei. The particle-number projection on top of the angular-momentum projection has been performed for the first time with the multicranked configuration-mixing.

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“…They have been observed in several mass regions around A=20, 40,80,130,150,165,190 and 240 [1]. Because of this fragmentation of the SD intensity, experimentalists have only been able to identify a small number of the strongest paths in a few cases [4][5][6][7][8][9][10][11] and these only when very large data sets have been obtained. The intensity reappears as electromagnetic transitions in the normal deformed (ND) minimum.…”

Section: Introductionmentioning

confidence: 99%

Multi-level and two-level models of the decay out of superdeformed bands

Sargeant

Hussein²,

Wilson

2005

AIP Conference Proceedings

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We compare a multi-level statistical model with a two-level model for the decay out of superdeformed rotational bands in atomic nuclei. We conclude that while the models depend on different dimensionless combinations of the input parameters and differ in certain limits, they essentially agree in the cases where experimental data is currently available. The implications of this conclusion are discussed.Comment: presented at the Nuclei and Mesoscopic Physics Workshop, Michigan, October 2004, to be published by A.I.P. Conf. Pro

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Direct Decay from the Superdeformed Band to the Yrast Line in D66152y86

Cited by 64 publications

References 32 publications

Quantal rotation and its coupling to intrinsic motion in nuclei

Quantal rotation and its coupling to intrinsic motion in nuclei

Importance of multicranked configuration mixing for angular-momentum-projection calculations: Study of superdeformed rotational bands in Dy152 and Hg194

Multi-level and two-level models of the decay out of superdeformed bands

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