Collective motion and deformed shell structure in the doubly even fp shell nuclei

Larsson, S E; Lèander, G.A.; Ragnarsson, I.; Alenius, N.G.

doi:10.1016/0375-9474(76)90042-7

Cited by 82 publications

(4 citation statements)

References 29 publications

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“…The identification of 76 Ge as a possible rigid triaxial nucleus was foreshadowed theoretically by Larsson et al [19], and then by Ragnarsson, Nilsson, and Sheline [20]. In the latter work, a potential-energy surface with a deep triaxially-deformed ground-state minimum centered at β = 0.27 and γ = 35 • was reported for 76 Ge.…”

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confidence: 87%

“…In the latter work, a potential-energy surface with a deep triaxially-deformed ground-state minimum centered at β = 0.27 and γ = 35 • was reported for 76 Ge. Furthermore, Larsson et al [19] predicted nonaxial shapes due to gaps in the single-particle spectrum for nuclei with neutron and/or proton numbers of 26, 32, 44, and 46 when β ∼ 0.3 and γ ∼ 30 • . Other, more recent calculations [21] support the view of triaxiality in 76 Ge.…”

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Novel ΔJ=1 Sequence in Ge78 : Possible Evidence for Triaxiali

et al. 2018

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A sequence of low-energy levels in _{32}^{78}Ge_{46} has been identified with spins and parity of 2^{+}, 3^{+}, 4^{+}, 5^{+}, and 6^{+}. Decays within this band proceed strictly through ΔJ=1 transitions, unlike similar sequences in neighboring Ge and Se nuclei. Above the 2^{+} level, members of this sequence do not decay into the ground-state band. Moreover, the energy staggering of this sequence has the phase that would be expected for a γ-rigid structure. The energies and branching ratios of many of the levels are described well by shell-model calculations. However, the calculated reduced transition probabilities for the ΔJ=2 in-band transitions imply that they should have been observed, in contradiction with the experiment. Within the calculations of Davydov, Filippov, and Rostovsky for rigid-triaxial rotors with γ=30°, there are sequences of higher-spin levels connected by strong ΔJ=1 transitions which decay in the same manner as those observed experimentally, yet are calculated at too high an excitation energy.

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Novel ΔJ=1 Sequence in Ge78 : Possible Evidence for Triaxiali

et al. 2018

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“…There are also theoretical calculations [%10] which try to clarify the nature of the collective and high spin states. Larsson et al [7] investigated the collective properties of the doubly even fp shell nuclei by a macroscopic-microscopic method. Their potential energy surfaces do not include pairing effects, and all the parameters entering into the kinetic energy are determined from one constant.…”

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confidence: 99%

Microscopic calculation of the collective motion in76Kr

Petrovici

Faessler

Köppel³

1983

Z Physik A

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A microscopic calculation of Bohr's collective Hamiltonian is used to describe the collective motion in the 76Kr isotope. A single-particle basis calculated in a deformed Woods-Saxon potential leads to the potential energy surface obtained by the Strutinsky renormalization procedure, and to the inertial functions determined in the cranking model approximation. The collective Schr6dinger equation is solved numerically. The low-energy, even parity states in 76Kr are analyzed in the frame of this model. The theoretical results involve the potential energy and the inertial parameters as functions of intrinsic quadrupole deformations, the collective levels and wave functions including their transitions and electromagnetic moments. A good agreement between experiment and theory is obtained without adjusting specifically for this nucleus any parameter in the model. Some results regarding statical and dynamical characteristics of even-even 74'TS, S~ isotopes are also presented.

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“…The quasibound state is thought to correspond to the hyperdeformed shape isomer of 56 Ni. Nilsson-model calculations have been performed in [22] in order to obtain the potential energies of doubly even p-f shell nuclei, and in [23] for a general discussion of superdeformation.…”

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confidence: 99%

Clusterization in the shape isomers of the56Ni nucleus

et al. 2011

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The interrelation of the quadrupole deformation and clusterization is investigated in the example of the 56 Ni nucleus. The shape isomers, including superdeformed and hyperdeformed states, are obtained as stability regions of the quasidynamical U(3) symmetry based on a Nilsson calculation. Their possible binary clusterizations are investigated by considering both the consequences of the Pauli exclusion principle and the energetic preference.

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Collective motion and deformed shell structure in the doubly even fp shell nuclei

Cited by 82 publications

References 29 publications

Novel ΔJ=1 Sequence in Ge78 : Possible Evidence for Triaxiali

Novel ΔJ=1 Sequence in Ge78 : Possible Evidence for Triaxiali

Microscopic calculation of the collective motion in76Kr

Clusterization in the shape isomers of the56Ni nucleus

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