Electric quadrupole moment of the first excited state of 12C

Vermeer, W.J.; Esat, T. M.; Kuehner, J. A.; Spear, R.H.; Baxter, A.M.; Hinds, S.

doi:10.1016/0370-2693(83)91160-7

Cited by 57 publications

(38 citation statements)

References 18 publications

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“…The charge radius is taken from Ajzenberg-Selove (1985). The measured value B(E2; 2+0 -0+0) = 7.76±0.43 e 2 fm 4 (Ajzenberg-Selove 1985) gives ..1e, from which one obtains Q(2+ 0) = 5.79 e fm2, compared with the experimental value 6±3 e fm2 (Vermeer et al 1983a;Ajzenberg-Selove 1985). Individual contributions to T12 are shown in Fig.…”

Section: ·11mentioning

confidence: 75%

See 1 more Smart Citation

Investigation of E1 Strength in Coulomb Excitation of Light Nuclei

Barke¹,

Woods²

1989

Aust. J. Phys.

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Contributions to the predominantly E2 Coulomb excitation of the first excited states of 6U, 7U, lOB, 11 B, 12C and 17 0 due to virtual E1 transitions through intermediate states are calculated using for all states shell model wavefunctions of the lowest admissible configurations, obtained with a realistic Hamiltonian. When harmonic oscillator single-particle wavefunctions are used, the contributions can be calculated rigorously but are generally less than the experimental values. Increases due to use of Woods-Saxon wavefunctions are estimated in a semi-quantitative way. For 17 0, the additional increase due to admixtures from higher configurations in the wavefunctions is also considered.

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Section: ·11mentioning

confidence: 75%

“…For lOB, our calculated value of k exceeds the experimental value. Fewell et al (1980Fewell et al ( ,1984 assumed k = 1 for II B in deriving their experimental value of B(E2; i--+ i-), and Vermeer et al (1983a) …”

Section: Discussionmentioning

confidence: 99%

Investigation of E1 Strength in Coulomb Excitation of Light Nuclei

Barke¹,

Woods²

1989

Aust. J. Phys.

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“…[41,42]. Such a negative value for the intrinsic quadrupole moment is only consistent with Q 0 = −eρ 2 3b /2, and therefore with the equilateral structure.…”

Section: B Rotational Modelmentioning

confidence: 86%

“…This result is in very good agreement with the computed intrinsic quadrupole moment for the 2 + 1 state, the values given in Refs. [41,42], and also with the values given in Table VI for the transitions between the states in the first band. We then conclude that the computed transition strengths and intrinsic quadrupole moments for the transitions between the states in the first band in the three-alpha system are consistent with the ones corresponding to transitions between the states of a rotational band in a three-alpha system where the three alphas are sitting in the vertices of an equilateral triangle.…”

Section: B Rotational Modelmentioning

confidence: 99%

Three-body bremsstrahlung and the rotational character of theC12spectrum

2015

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The electric quadrupole transitions between 0 + , 2 + , and 4 + states in 12 C are investigated in a 3α model. The three-body wave functions are obtained by means of the hyperspherical adiabatic expansion method, and the continuum is discretized by imposing a box boundary condition. Corresponding expressions for the continuum three-body (3α) bremsstrahlung and photon dissociation cross sections are derived and computed for two different α-α potentials. The available experimental energy dependence is reproduced and a series of other cross sections are predicted. The transition strengths are defined and derived from the cross sections, and compared to schematic rotational model predictions. The computed properties of the 12 C resonances suggest that the two lowest bands are made, respectively, by the states {0 For the second band, the transitions are also consistent with a rotational pattern, but with the three alphas in an aligned arrangement.

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“…4. Let us first note that the lowest The measured quadrupole moment of the core 12 C is Q 0 = −(22±10) e fm 2 [56], suggesting an oblate shape. This gives a quite large quadrupole deformation (β ∼ = −0.6).…”

Section: C and 11 Be Within The Quasiparticle-core Modelmentioning

confidence: 96%

Pairing correlations in odd-mass carbon isotopes and effect of Pauli principle in particle–core coupling in 13C and 11Be

et al. 2007

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We present an exploratory study of structure of 13 C, 15 C, 17 C and 19 C, showing that the simple one-quasiparticle projected BCS (PBCS) model is capable to account for several important properties of these nuclei. Next we discuss the importance of the Pauli Principle in the particle-core models of normal-parity states in 13 C and 11 Be. This is done by considering the pairing interaction between nucleons moving in an over-all deformed potential. To assess the importance of pairing correlations in these light nuclei we use both the simple BCS and the PBCS approximations. We show that the Pauli Principle plays a crucial role in the parity inversion in 11 Be. It is also found that the effect of the particle number conservation in relatively light and/or exotic nuclei is quite significant. Comparison of our results with several recent papers on the same subject, as well as with some experimental data, is presented.

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Electric quadrupole moment of the first excited state of 12C

Cited by 57 publications

References 18 publications

Investigation of E1 Strength in Coulomb Excitation of Light Nuclei

Investigation of E1 Strength in Coulomb Excitation of Light Nuclei

Three-body bremsstrahlung and the rotational character of theC12spectrum

Pairing correlations in odd-mass carbon isotopes and effect of Pauli principle in particle–core coupling in 13C and 11Be

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