Coulomb dissociation reaction and correlations of two halo neutrons in 11Li

Shimoura, S.; Nakamura, Takashi; Ishihara, M.; Inabe, N.; Kobayashi, Toshio; Kubo, T.; Siemssen, R.H.; Tanihata, I.; Watanabe, Yutaka

doi:10.1016/0370-2693(95)00131-4

Cited by 169 publications

(202 citation statements)

References 19 publications

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“…These numbers are consistent with the experimental data given in [47]. In columns 2 and 4 of table 4 we give the computed 11 Li resonance energies and widths for the 10 Li spectra in the left and right parts of fig.1, respectively. From the resonance energies shown in table 4 we see that only the 1/2 + excited state in column 4, and to a lower extent the 3/2 + state in the same column, gives rise to an excitation energy of around 1 MeV in agreement with the available experimental values ( E ⋆ = 1.25 ± 0.15 [12] and E ⋆ = 1.02 ± 0.07 [14]).…”

Section: Dipole Excitationssupporting

confidence: 87%

“…We observe in the figure insets that for the 1/2 + and the 3/2 + excited states the presence of a low-lying 1 − s-state is making the lowest λ slightly deeper than when we have the 2 − level at 50 keV. For the 5/2 + state it is the opposite, the 2 − level in 10 Li favors a deeper λ-function. The reason is that 1/2 + , but not 5/2 + , can be constructed when both neutron-core states simultaneously are relative 1 − -states and vice versa, 5/2 + , but not 1/2 + , can be constructed when both neutron-core states simultaneously are relative 2 − -states.…”

Section: Complex Rotated Hyperspherical Adiabatic Potentialsmentioning

confidence: 62%

“…At least for the sets of data from refs. [9] and [10], for which the 11 Li beam energy is similar, one would expect also a similar experimental distribution. More consistent and accurate experimental measurements are therefore necessary.…”

Section: Energy (Mev)mentioning

confidence: 71%

“…Therefore a 1 + p-resonance at 0.25 MeV as chosen in the present calculations is a lower limit of the predicted energy range. The effect of a higher energy for the 1 + resonance in 10 Li can be seen in the columns 3 and 5 of table 4, where we have chosen an energy of 0.45 MeV for the 1 + p-resonance. Of course this higher energy value is producing higher energies for the three-body excited states.…”

Section: Dipole Excitationsmentioning

confidence: 99%

“…Coulomb dissociation of 11 Li on Pb at 28, 43 and 280 MeV/nucleon shows a prominent peak at about 1 MeV in the differential B(E1)-distribution in several experiments [9][10][11]. Unfortunately the results of these experiments differ significantly from each other.…”

Section: Introductionmentioning

confidence: 99%

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Dipole excited states in 11Li with complex scaling

Garrido¹,

Fedorov²,

Jensen³

2002

Nuclear Physics A

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The 1 − excitations of the three-body halo nucleus 11 Li are investigated. We use adiabatic hyperspherical expansion and solve the Faddeev equations in coordinate space. The method of complex scaling is used to compute the resonance states. The Pauli forbidden states occupied by core neutrons are excluded by constructing corresponding complex scaled phase equivalent two-body potentials. We use a recently derived neutron-core interaction consistent with known structure and reaction properties of 10 Li and 11 Li. The computed dipole excited states with J π = 1/2 + , J π = 3/2 + , and J π = 5/2 + have energies ranging from 0.6 MeV to 1.0 MeV and widths between 0.15 MeV and 0.65 MeV. We investigate the dependence of the complex energies of these states on the 10 Li spectrum. The finite spin 3/2 of the core and the resulting core-neutron spin-spin interaction are important. The connection with Coulomb dissociation experiments is discussed and a need for better measurements is pointed out. : 21.45.+v, 25.10.+s, 25.60.Gc PACS

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Section: Dipole Excitationssupporting

confidence: 87%

Section: Complex Rotated Hyperspherical Adiabatic Potentialsmentioning

confidence: 62%

Section: Energy (Mev)mentioning

confidence: 71%

Section: Dipole Excitationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dipole excited states in 11Li with complex scaling

Garrido¹,

Fedorov²,

Jensen³

2002

Nuclear Physics A

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Breakup reactions of halo nuclei

Nakamura¹,

Fukuda²

The 4th International Conference on Exotic Nuclei and Atomic Masses

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Breakup Reaction Models for Two- and Three-Cluster Projectiles

Baye

Capel

2012

Clusters in Nuclei, Vol.2

107

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Breakup reactions are one of the main tools for the study of exotic nuclei, and in particular of their continuum. In order to get valuable information from measurements, a precise reaction model coupled to a fair description of the projectile is needed. We assume that the projectile initially possesses a cluster structure, which is revealed by the dissociation process. This structure is described by a few-body Hamiltonian involving effective forces between the clusters. Within this assumption, we review various reaction models. In semiclassical models, the projectile-target relative motion is described by a classical trajectory and the reaction properties are deduced by solving a time-dependent Schrödinger equation. We then describe the principle and variants of the eikonal approximation: the dynamical eikonal approximation, the standard eikonal approximation, and a corrected version avoiding Coulomb divergence. Finally, we present the continuum-discretized coupled-channel method (CDCC), in which the Schrödinger equation is solved with the projectile continuum approximated by square-integrable states. These models are first illustrated by applications to two-cluster projectiles for studies of nuclei far from stability and of reactions useful in astrophysics. Recent extensions to threecluster projectiles, like two-neutron halo nuclei, are then presented and discussed. We end this review with some views of the future in breakup-reaction theory. D. Baye Physique Quantique, C.P. 165/82 and Physique Nucléaire Théorique et Physique Mathématique, C.P. 229, Université Libre de Bruxelles,

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Coulomb dissociation reaction and correlations of two halo neutrons in 11Li

Cited by 169 publications

References 19 publications

Dipole excited states in 11Li with complex scaling

Dipole excited states in 11Li with complex scaling

Breakup reactions of halo nuclei

Breakup Reaction Models for Two- and Three-Cluster Projectiles

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