Structural evolution of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Z</mml:mi><mml:mo>=</mml:mo><mml:mn>52</mml:mn><mml:mo>–</mml:mo><mml:mn>62</mml:mn></mml:mrow></mml:math>neutron-deficient nuclei in the interacting boson approximation framework

Pascu, S.; Zamfir, N. V.; Cǎta-Danil, G.; Mărginean, N.

doi:10.1103/physrevc.81.054321

Cited by 23 publications

(20 citation statements)

References 33 publications

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“…Effective charges of e ν = 0.12 and e π = 0.13 for neutrons and protons, respectively, were found in a χ 2 minimization to reproduce the experimental B(E2; 2 + 1 → 0 + 1 ), B(E2; 4 + 1 → 2 + 1 ), and B(E2; 2 + 2 → 2 + 1 ) values. The values for the effective charges are similar to those found in previous investigations for this mass region [19]. The resulting B(E2) values, which are included in Table V, are in good agreement with the experimental values.…”

Section: B Algebraic Modelssupporting

confidence: 87%

Structure of low-lying states inSm140studied by Coulomb excitation

Klintefjord¹,

Hadyńska-Klęk²,

Görgen³

et al. 2016

Phys. Rev. C

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The electromagnetic structure of 140 Sm was studied in a low-energy Coulomb excitation experiment with a radioactive ion beam from the REX-ISOLDE facility at CERN. The 2 + and 4 + states of the ground-state band and a second 2 + state were populated by multi-step excitation. The analysis of the differential Coulomb excitation cross sections yielded reduced transition probabilities between all observed states and the spectroscopic quadrupole moment for the 2 + 1 state. The experimental results are compared to large-scale shell model calculations and beyond-mean-field calculations based on the Gogny D1S interaction with a five-dimensional collective Hamiltonian formalism. Simpler geometric and algebraic models are also employed to interpret the experimental data. The results indicate that 140 Sm shows considerable γ softness, but in contrast to earlier speculation no signs of shape coexistence at low excitation energy. This work sheds more light on the onset of deformation and collectivity in this mass region.

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Section: B Algebraic Modelssupporting

confidence: 87%

Structure of low-lying states inSm140studied by Coulomb excitation

Klintefjord¹,

Hadyńska-Klęk²,

Görgen³

et al. 2016

Phys. Rev. C

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“…In order to treat these spectroscopic observables in a reasonable approach, we used the method suggested in Ref. [20], where it was shown that the addition of the second-order O(5) Casimir operator in the Hamiltonian can account for the observed (p,t) spectroscopic factors.…”

Section: Ibm Calculationsmentioning

confidence: 99%

0+states and collective bands in228Th studied by the (p,
Levon
¹
,
Graw
²
,
Hertenberger
³

et al. 2013
Phys. Rev. C
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The excitation spectra in the deformed nucleus 228 Th have been studied by means of the (p,t) reaction, using the Q3D spectrograph facility at the Munich Tandem accelerator. The angular distributions of tritons were measured for about 110 excitations seen in the triton spectra up to 2.5 MeV. Firm 0 + assignments are made for 17 excited states by comparison of experimental angular distributions with the calculated ones using the CHUCK3 code. Assignments up to spin 6 + are made for other states. Sequences of states are selected which can be treated as rotational bands and as multiplets of excitations. Moments of inertia have been derived from these sequences, whose values may be considered as evidence of the two-phonon nature of most 0 + excitations. Experimental data are compared with interacting boson model (IBM) and quasiparticle-phonon model (QPM) calculations and with experimental data for 229 Pa.

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“…The IBM-1, in which neutron and proton motion is indistinguishable, has recently been used to examine in detail systematics across the Te isotopic chain [34,35]. The excitation energies of the lowest positive-parity levels in the Te isotopes and a limited set of electromagnetic transition rates for these nuclei were investigated in each of these studies, as well as two-neutron separation energies in Ref.…”

Section: Ibm-1: U(5) Model Calculationsmentioning

confidence: 99%

“…The excitation energies of the lowest positive-parity levels in the Te isotopes and a limited set of electromagnetic transition rates for these nuclei were investigated in each of these studies, as well as two-neutron separation energies in Ref. [34]. The model parameters obtained were mapped onto the IBM symmetry triangle in Ref.…”

Section: Ibm-1: U(5) Model Calculationsmentioning

confidence: 99%

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Collective and two-quasiparticle excitations in128Te

et al. 2012

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Excited levels of 128 Te to 3.3 in MeV excitation have been studied using γ-ray spectroscopy following inelastic scattering of accelerator-produced neutrons. Spectroscopic information, including transition energies, level spins, E2/M1 multipole-mixing ratios, and γ-ray branching ratios, was determined from γ-ray excitation functions measured from E n = 2.15 to 3.33 MeV in 90 keV increments, γ-ray angular distributions measured at E n = 2.2, 2.8, and 3.3 MeV, and γγ coincidences measured at E n = 3.6 MeV. Lifetimes of levels in 128 Te were deduced using Doppler-shift attenuation techniques. Absolute transition probabilities were determined for many levels and compared to interacting boson model and particle-core coupling model calculations to identify few particle and collective structures; states exhibiting the decay characteristics expected for two-phonon, mixed-symmetry, and quadrupole-octupole coupled states are identified.

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Structural evolution of theZ=52–62neutron-deficient nuclei in the interacting boson approximation framework

Cited by 23 publications

References 33 publications

Structure of low-lying states inSm140studied by Coulomb excitation

Structure of low-lying states inSm140studied by Coulomb excitation

0+states and collective bands in228Th studied by the (p,
Levon
¹
,
Graw
²
,
Hertenberger
³

et al. 2013
Phys. Rev. C
Self Cite
26
9
70
0
View full text Add to dashboard Cite

Collective and two-quasiparticle excitations in128Te

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Structural evolution of theZ=52–62neutron-deficient nuclei in the interacting boson approximation framework

Cited by 23 publications

References 33 publications

Structure of low-lying states inSm140studied by Coulomb excitation

Structure of low-lying states inSm140studied by Coulomb excitation

0+states and collective bands in228Th studied by the (p,Levon1, Graw2, Hertenberger3 et al. 2013Phys. Rev. CSelf Cite269700View full textAdd to dashboardCite

Collective and two-quasiparticle excitations in128Te

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Resources

About

0+states and collective bands in228Th studied by the (p,
Levon
¹
,
Graw
²
,
Hertenberger
³

et al. 2013
Phys. Rev. C
Self Cite
26
9
70
0
View full text Add to dashboard Cite