A method to remove virtual interactions with applications to nuclear spectroscopy

Bengtsson, T.

doi:10.1016/0375-9474(89)90216-9

Cited by 154 publications

(93 citation statements)

References 23 publications

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“…Theoretical quasiparticle Routhians were generated using the UC code [14,15], and are shown in Fig. 16.…”

Section: Interpretation Of Band Structuresmentioning

confidence: 99%

“…Several theoretical investigations successfully predicted the existence of this island of TSD structures. Among them, systematic cranking calculations employing the ultimate cranker (UC) code [14,15] suggest that the TSD minima with deformation parameters (ε 2 , γ) ∼ (0.4, ±20 • ) in the potential energy surfaces are stabilized by large single-particle shell gaps associated with proton numbers Z=71 and 72 and neutron numbers N =94 and 97 at large triaxiality [16][17][18]. So far, the Z=71 proton shell gap is clearly well established, where an aligned i 13/2 quasiproton plays an important role in the development of the stability of these TSD nuclear shapes [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Toward complete spectroscopy ofLu167

Roux¹,

Ma²,

Hagemann

et al. 2015

Phys. Rev. C

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Excited states in 167 Lu were populated in the 123 Sb( 48 Ca,4n) reaction at 203 MeV and decay γ-rays measured using the Gammasphere spectrometer array. Two triaxial strongly deformed bands were identified previously and interpreted as zero-and one-phonon wobbling excitations. As a result of more extensive band search, the level scheme has been considerably extended to include ten new rotational bands, and some 630 γ-ray transitions. A number of interband linking transitions were revealed, so that all but two bands could be connected with each other. Configurations are proposed for all new bands based on measured observables, with the help of Cranked Shell Model calculations. A γ-ray sequence, previously suggested as a triaxial strongly deformed band based on quasiparticle excitations coexisting with the wobbling excitation in the triaxial potential well, has now been determined to be a signature partner of a coupled band, associated with a normal deformed five-quasiparticle configuration. The possibility for two new bands being associated with triaxial deformation is discussed.

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“…Theoretical quasiparticle Routhians were generated using the UC code [14,15], and are shown in Fig. 16.…”

Section: Interpretation Of Band Structuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Toward complete spectroscopy ofLu167

Roux¹,

Ma²,

Hagemann

et al. 2015

Phys. Rev. C

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show abstract

“…In order to approximately restore the angular momentum conservation law by hand near the level crossing region, at an expense of the virtue of the mean-field theory stated above, it might be meaningful to eliminate the spurious interaction and to introduce a diabatic orbit [13]. With regards to the non-adiabatic (diabatic) effects due to the fast nuclear rotation, rotation-induced timeodd components of one-body density have been introduced and analysed in Refs.…”

Section: Introductionmentioning

confidence: 99%

Characteristic feature of self-consistent mean-field in level crossing region

2004

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A shape change of the self-consistent mean-field induced by a configuration change is discussed within the conventional constrained Hartree-Fock (CHF) theory. It is stressed that a single-particle level crossing dynamics should be treated carefully, because the shape of the mean-field in such a finite many-body system as the nucleus strongly changes depending on its configuration. This situation is clearly shown by applying an adiabatic assumption, where the most energetically favorable single-particle states are assumed to be occupied. The excited HF states and the continuouslyconnected potential energy curves are given by applying the configuration dictated CHF method.The effect of pairing correlation is discussed in the level crossing region. Triaxial deformed results in our Hartree-Fock-Bogoliubov (HFB) calculation with Gogny force nicely reproduce the available experimental data of Ge isotopes. From our numerical calculation, it is concluded that the CHFB state is more fragile than the CHF state in the level crossing region.

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“…Cranking calculations for 171 Hf have been carried out with the UC code [10][11][12]. Proton and neutron orbital energies for the ND region are displayed on the Routhian diagrams in Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Triaxial strongly deformed (TSD) structures have also been observed in several other neighboring nuclei of the mass A ∼ 160 region, e.g., in 168 Hf [8,9]. Cranking calculations employing the ultimate cranker (UC) code [10][11][12] suggest that the TSD minima with deformation parameters (ε 2 , γ) ∼ (0.4, ±20…”

Section: Introductionmentioning

confidence: 99%

High-spin proton alignments and evidence for a second band with enhanced deformation in171Hf

Zhang

Ijaz

et al. 2012

Phys. Rev. C

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High-spin properties of the nucleus 171 Hf were studied through the 128 Te( 48 Ca,5n) reaction. Previously known bands have been extended to significantly higher spins and four new bands have been extracted from these data. The results are discussed within the framework of the cranked shell model aided by a comparison with level structures in the neighboring nuclei. The band crossings at rotational frequencies ∼500 keV are interpreted as caused by the alignments of h 11/2 and h 9/2 proton orbitals. Band ED2 exhibits an alignment pattern similar to that of band ED1 which was reported in a recent paper and proposed to be built upon a second potential energy minimum involving the deformation-driving proton i 13/2 ⊗ h 9/2 configuration. It is likely that band ED2 is also associated with a deformation enhanced with respect to that of the normal deformed structures. Further experimental investigation is needed to ascertain the nature of this band.

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A method to remove virtual interactions with applications to nuclear spectroscopy

Cited by 154 publications

References 23 publications

Toward complete spectroscopy ofLu167

Toward complete spectroscopy ofLu167

Characteristic feature of self-consistent mean-field in level crossing region

High-spin proton alignments and evidence for a second band with enhanced deformation in171Hf

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