Description of positive and negative parity dipole bands within the extended coherent state model

Râduţâ, A. A.; Raduta, C. M.; Faessler, Amand

doi:10.1016/j.physletb.2006.02.054

“…6, 7 from the present paper and 3 of Refs. ( [20,21]) we remark that for 172 Yb, 238 U, and 238 Pu the second order energy displacements vanish for 2-3 consecutive values of angular momenta, while for 226 Ra this is zero or very close to zero for I ≥ 11. In the right upper corner of Figs.…”

Section: B Dipole Bands Energiesmentioning

confidence: 72%

Simultaneous Description of Four Positive and Four Negative Parity Bands

Râduţâ

¹

,

Raduta²

2007

Collective Motion and Phase Transitions in Nuclear Systems

0

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The extended coherent state model is further extended in order to describe two dipole bands of different parities. The formalism provides a consistent description of eight rotational bands. A unified description for spherical, transitional and deformed nuclei is possible. Projecting out the angular momentum and parity from a sole state, the K π = 1 + band acquires a magnetic character, while the electric properties prevail for the other band. Signatures for a static octupole deformation in some states of the dipole bands are pointed out. Some properties which distinguish between the dipole band states and states of the same parity but belonging to other bands are mentioned. Interesting features concerning the decay properties of the two bands are found.

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“…6, 7 from the present paper and 3 of Refs. ( [20,21]) we remark that for 172 Yb, 238 U, and 238 Pu the second order energy displacements vanish for 2-3 consecutive values of angular momenta, while for 226 Ra this is zero or very close to zero for I ≥ 11.…”

Section: B Dipole Bands Energiesmentioning

confidence: 72%

“…The formalism presented in the previous section has been numerically applied for seven nuclei: 158 Gd, 172 Yb, 226 Ra, 228 Th, 232 Th, 238 U, 238 Pu. Since some results for 172 Yb and 226 Ra were earlier reported [20,21], for these nuclei we mention only the features not presented there. The experimental data are taken from Refs.…”

Section: A Parameter Descriptionmentioning

confidence: 99%

“…In Ref. [20] we interpreted the vanishing of the displacement function for a very short interval of J in a way which conciliate between the band intersection and static octupole deformation. Indeed, for such states it may happen that they could be obtained by projection from an octupole deformed state which is different from the chosen model state for the dipole bands.…”

Section: Electromagnetic Transition Probabilitiesmentioning

confidence: 99%

See 1 more Smart Citation

Simultaneous description of four positive parity bands and four negative parity bands

Râduţâ

¹

,

Raduta²,

Raduta³

2006

View full text Add to dashboard Cite

The extended coherent state model is further extended in order to describe two dipole bands of different parities. The formalism provides a consistent description of eight rotational bands. A unified description for spherical, transitional and deformed nuclei is possible. Projecting out the angular momentum and parity from a sole state, the K π = 1 + band acquires a magnetic character, while the electric properties prevail for the other band. Signatures for a static octupole deformation in some states of the dipole bands are pointed out. Some properties which distinguish between the dipole band states and states of the same parity but belonging to other bands are mentioned. Interesting features concerning the decay properties of the two bands are found. Numerical applications are made for 158 Gd, 172 Yb, 228,232 Th, 226 Ra, 238 U and 238 Pu, and the results are compared with the available data.

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“…1 The simultaneous treatment of axial and non-axial octupole modes is considered, e.g., in [16,17] and in [18].…”

Section: The Bases Of the Modelmentioning

confidence: 99%

Description of nuclear octupole and quadrupole deformation close to axial symmetry: Octupole vibrations in the X(5) nucleiNd150andSm
Bizzeti
¹
,
Bizzeti‐Sona
²

2010
Phys. Rev. C
33
0
24
0
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The model, introduced in a previous paper, for the description of the octupole and quadrupole degrees of freedom in conditions close to the axial symmetry, is used to describe the negative-parity band based on the first octupole vibrational state in nuclei close to the critical point of the U(5) to SU(3) phase transition. The situation of 150 Nd and 152 Sm is discussed in detail. The positive parity levels of these nuclei, and also the in-band E2 transitions, are reasonably accounted for by the X(5) model. With simple assumptions on the nature of the octupole vibrations, it is possible to describe, with comparable accuracy, also the negative parity sector, without changing the description of the positive-parity part.PACS numbers: 21.60.Ev 154 64 Gd and 156 66 Dy. The lowest negative-parity levels not belonging to the K π = 0 − sequence are shown as full dots.

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Description of positive and negative parity dipole bands within the extended coherent state model

Cited by 4 publications

References 23 publications

Simultaneous Description of Four Positive and Four Negative Parity Bands

Simultaneous Description of Four Positive and Four Negative Parity Bands

Simultaneous description of four positive parity bands and four negative parity bands

Description of nuclear octupole and quadrupole deformation close to axial symmetry: Octupole vibrations in the X(5) nucleiNd150andSm
Bizzeti
¹
,
Bizzeti‐Sona
²

2010
Phys. Rev. C
33
0
24
0
View full text Add to dashboard Cite

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Description of positive and negative parity dipole bands within the extended coherent state model

Cited by 4 publications

References 23 publications

Simultaneous Description of Four Positive and Four Negative Parity Bands

Simultaneous Description of Four Positive and Four Negative Parity Bands

Simultaneous description of four positive parity bands and four negative parity bands

Description of nuclear octupole and quadrupole deformation close to axial symmetry: Octupole vibrations in the X(5) nucleiNd150andSmBizzeti1, Bizzeti‐Sona2 2010Phys. Rev. C330240View full textAdd to dashboardCite

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About

Description of nuclear octupole and quadrupole deformation close to axial symmetry: Octupole vibrations in the X(5) nucleiNd150andSm
Bizzeti
¹
,
Bizzeti‐Sona
²

2010
Phys. Rev. C
33
0
24
0
View full text Add to dashboard Cite