Coulomb excitation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow /><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>144</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>,146,148,150Nd

Ahmad, Arafat; Bomar, G. L.; Crowell, H. L.; Hamilton, J. H.; Kawakami, H.; Maguire, C.; Nettles, W. G.; Piercey, R. B.; Ramayya, A. V.; Soundranayagam, R.; Ronningen, R. M.; Scholten, Olaf; Stelson, P.H.

doi:10.1103/physrevc.37.1836

Cited by 14 publications

(4 citation statements)

References 15 publications

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“…Originally, the Coulomb excitation technique (referred to as 'Coulex' in the following) was used to measure properties of the target (e.g. [3,4]). The sub-Coulomb energies at which the reaction took place ensured a nuclear-free measurement.…”

mentioning

confidence: 99%

On the measurement of B(E2, 0⁺₁ → 2⁺₁) using intermediate-energy Coulomb excitation

Delaunay¹,

Nunes²

2007

J. Phys. G: Nucl. Part. Phys.

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Coulomb excitation is a standard method used to extract quadrupole excitation strengths of even-even nuclei. In typical analyses the reaction is assumed to be one-step, Coulomb only, and is treated within a semi-classical model. In this work, fully-quantal coupled-channel calculations are performed for three test cases in order to determine the importance of multi-step effects, nuclear contributions, feeding from other states and corrections to the semi-classical approximation. We study the excitation of 30 S, 58 Ni and 78 Kr on 197 Au at ≈ 50 AMeV. We find that nuclear effects may contribute more than 10% and that feeding contributions can be larger than 15%. These corrections do not alter significantly the published B(E2) values, however an additional theoretical error of up to 13% should be added to the experimental uncertainty if the semi-classical model is used. This theoretical error is reduced to less than 7% when performing a quantal coupled-channel analysis.

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mentioning

confidence: 99%

On the measurement of B(E2, 0⁺₁ → 2⁺₁) using intermediate-energy Coulomb excitation

Delaunay¹,

Nunes²

2007

J. Phys. G: Nucl. Part. Phys.

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“…In the pure liquiddrop model, these reduced transition rates should be equal. However, in ' Nd the 0& -+2+ transition rate is 10 times the 0 -+2& rate [19,20], despite the fact that the intraband 2 -+0 rate is the same for the /3 band as for the ground-state band. These transitions rates lead to a zero-point amplitude of 0.019 (for the weaker transition) and 0.058 (for the stronger transition).…”

Section: C-150ndmentioning

confidence: 92%

Photon-decay modes of the giant dipole resonance in even-ANd isotopes

Hoblit

Nathan

1991

Phys. Rev. C

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The photon-decay modes of the giant dipole resonance (GDR) in the nuclei ' ' ' ' Nd were investigated via elastic and inelastic photon scattering. Considerable inelastic scattering was seen into the first excited state of each nucleus. In ' Nd and " Nd, scattering into several higher levels was also resolved and found to be quite weak. The data are interpreted in the context of both the dynamic collective model and interacting boson model. In these models, the photon decays of the GDR to excited states are a consequence of the coupling between the giant resonance and collective surface degrees of freedom, such as rotations and vibrations. The present data provide the first experimental test of the photondecay predictions of these models across an entire transitional chain. Both models give an excellent account of the data. I. INTRQDUCTIl3NThis paper reports a photon-scattering study of the photon-decay modes of the giant dipole resonance (GDR) in the transitional chain of Nd isotopes. The motivation for this work is to test nuclear structure models that predict these decay modes based on the coupling between the GDR and low-lying collective levels. It has long been believed that one of the primary mechanisms for the damping of collective giant multipole strength is through the coupling to low-lying collective degrees of freedom, such as quadrupole or octopole surface vibrations. In particular, there is considerable evidence that the GDR is strongly coupled to collective quadrupole surface vibrations and that this coupling often dominates the structure of the GDR, especially in medium and heavy nuclei [l].The consequences of this coupling are the mixture of surface vibrational components into the GDR state, the fractionation and consequent spreading of the GDR into vibrational satellite peaks, and the acquisition of often substantial branching ratios for photon emission from the GDR to low-lying vibrational levels. Photon scattering is an ideal reaction for probing the coupling of the dipole and quadrupole modes, since photons strongly and selectively excite the dipole mode and since inelastic scattering to vibrational states provides a direct measure of the mixture of vibrational components into the wave function of the GDR. Historically, the first attempt to describe the coupling quantitatively was the hydrodynamic model and its extension, the dynamic collective model (DCM) [2], where the coupling is a consequence of the hydrodynamic result that the frequency of the dipole mode of a liquid drop is proportional to the inverse of the radius of the drop. This leads to the well-documented scaling of the GDR energy with 2 ' as well as the energy splitting of the resonance in nuclei with a static deformation. For nuclei with a vibrating surface, this leads to an almost classical problem of the coupling between high-frequency dipole modes and low-frequency surface modes, resulting in an admixture of surface vibrati. onal components into the GDR state. Qualitatively, for nuclei that are "soft" vibrators (i.e. , low freq...

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“…(Andreev et al 1961;Eccleshall et al 1966;Engler 1970;present work) and from inelastic electron scattering (Pitthan 1973). Those for 144Nd, all from Coulomb excitation, are from Lemberg (1960), Nathan and Popov (1960), Ecceshall et al (1966), Burginyon et al (1967), Crowley et al (1971), Fahlander et al (1980), and Ahmad et al (1988). (Table 3) TheoryA Experiment IBM-2 U(5) 142Ce 144Nd …”

Section: (C) Values Of B(e2; 41--21)mentioning

confidence: 99%

Coulomb Excitation of 142Ce and 144Nd

Vermeer¹,

Burnett²,

Cyapong³

et al. 1989

Aust. J. Phys.

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The N = 84 nuclei 142Ce and 144Nd have been Coulomb-excited using 4He, 12C and 16 0 projectiles. Scattered particles were detected at a mean laboratory angle of 170.6° with an annular silicon surface-barrier detector. The static quadrupole moment of the 2t state was determined for both nuclei. In addition, various electromagnetic transition probabilities involving the 2~, 2~, 31 and 4t states were measured. Taken in conjunction with previous information, the results show that the properties of 142Ce and 144Nd are well described by the vibrational U(S) limit of IBM-2, and strongly support the proposition that the 2~ level in each nucleus is an essentially pure one d-boson mixed-symmetry state.

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Coulomb excitation of144,146,148,150Nd

Cited by 14 publications

References 15 publications

On the measurement of B(E2, 0⁺₁ → 2⁺₁) using intermediate-energy Coulomb excitation

On the measurement of B(E2, 0⁺₁ → 2⁺₁) using intermediate-energy Coulomb excitation

Photon-decay modes of the giant dipole resonance in even-ANd isotopes

Coulomb Excitation of 142Ce and 144Nd

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Coulomb excitation of144,146,148,150Nd

Cited by 14 publications

References 15 publications

On the measurement of B(E2, 0+1 → 2+1) using intermediate-energy Coulomb excitation

On the measurement of B(E2, 0+1 → 2+1) using intermediate-energy Coulomb excitation

Photon-decay modes of the giant dipole resonance in even-ANd isotopes

Coulomb Excitation of 142Ce and 144Nd

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On the measurement of B(E2, 0⁺₁ → 2⁺₁) using intermediate-energy Coulomb excitation

On the measurement of B(E2, 0⁺₁ → 2⁺₁) using intermediate-energy Coulomb excitation