Study of 14Be with core excitation

Tarutina, T.; Thompson, I. J.; Tostevin, J. A.

doi:10.1016/j.nuclphysa.2003.12.003

Cited by 59 publications

(37 citation statements)

References 33 publications

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“…On the other hand, 14 Be has been of experimental and theoretical interest due to its 2n-halo structure. Recent theoretical analysis has shown that the ground state configuration of 14 Be is most probably also a complex one, having components from the coupling of s, p and d neutrons with a 12 Be(0 + ) core, but also with an excited 12 Be(2 + ) core [25,26]. Sugimoto et al [1] argue (based on shell model calculations) that 14 Be(g.s.)…”

Section: Discussionmentioning

confidence: 99%

Search for the15Be ground state

et al. 2011

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Section: Discussionmentioning

confidence: 99%

Search for the15Be ground state

et al. 2011

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“…The calculation with larger average matrix element 30 and 35 MeV, gives an oblate shape with deformation parameter equal to -0.23 and -0.32 respectively. (In this calculation we introduced a lower 2 + rotational energy in 14 C ε 2 + = 3 MeV). This confirms the idea that the core nucleus 14 C is nearly spherical and supports the possibility of halo formation for 15 C. Finally, our calculation also predicts a first excited state 5 [11].…”

Section: Results and Conclusionmentioning

confidence: 99%

“…(In this calculation we introduced a lower 2 + rotational energy in 14 C ε 2 + = 3 MeV). This confirms the idea that the core nucleus 14 C is nearly spherical and supports the possibility of halo formation for 15 C. Finally, our calculation also predicts a first excited state 5 [11]. A simple explanation for this experimental result could be found in the so called J = j −1 anomaly discussed by Bohr and Mottelson [18].…”

Section: Results and Conclusionmentioning

confidence: 99%

Quasiparticle-rotor model description of carbon isotopes

Tarutina

Samana²,

Krmpotić³

et al. 2006

Braz. J. Phys.

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In this work we perform quasiparticle-rotor coupling model calculations within the usual BCS and the projected BCS for the carbon isotopes 15 C, 17 C and 19 C using 13 C as the building block. Owing to the pairing correlation, we find that 13 C as well as the cores of the other isotopes, namely 14 C, 16 C and 18 C acquire strong and varied deformations. The deformation parameter is large and negative for 12 C, very small (or zero) for 14 C and large and positive for 16 C and 18 C. This finding casts a doubt about the purity of the supposed simple one-neutron halo nature of 19 C.

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“…However, as it has been discussed in the previous section, the situation is much more complicated [ 18]- [ 22] and in particular the calculations of Ref. [ 23] show that there is a large component (2s 1/2 , 1d 5/2 ) ⊗ | 12 Be, 2 + > with the core in its low energy 2 + state which can modify the neutron distribution. Figure 2.…”

Section: Structure Ofmentioning

confidence: 91%

Unbound Exotic Nuclei Studied by Projectile Fragmentation

Blanchon

Bonaccorso

Camacho

et al. 2007

Theoretical Nuclear Physics in Italy

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We call projectile fragmentation of neutron halo nuclei the elastic breakup (diffraction) reaction, when the observable studied is the neutron-core relative energy spectrum. This observable has been measured in relation to the Coulomb breakup on heavy target and recently also on light targets. Such data enlighten the effect of the neutron final state interaction with the core of origin. Projectile fragmentation is studied here by a time dependent model for the excitation of a nucleon from a bound state to a continuum resonant state in a neutron-core complex potential which acts as a final state interaction. The final state is described by an optical model S-matrix so that both resonant and non resonant states of any continuum energy can be studied as well as deeply bound initial states. It turns out that due to the coupling between the initial and final states, the neutron-core free particle phase shifts are modified, in the exit channel, by an additional phase. Some typical numerical calculations for the relevant observables are presented and compared to experimental data. It is suggest that the excitation energy spectra of an unbound nucleus might reflect the structure of the parent nucleus from whose fragmentation they are obtained.

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Study of 14Be with core excitation

Cited by 59 publications

References 33 publications

Search for the15Be ground state

Search for the15Be ground state

Quasiparticle-rotor model description of carbon isotopes

Unbound Exotic Nuclei Studied by Projectile Fragmentation

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