New Insight into Halo Fragmentation

Ershov, S. N.; Danilin, B. V.; Rogde, T.; Vaagen, J. S.

doi:10.1103/physrevlett.82.908

Cited by 26 publications

(19 citation statements)

References 20 publications

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“…When we deal with a Borromean halo, the neutron-neutron interaction with scattering length ∼16 fm is decisive for this effect (also called "continuum pairing"). Additionally, in the 11 Li case, the presence of an intruder virtual s level (antibound) in 10 Li gives a large (but still not fully known) scattering length, which contributes essentially to the abnormally large matter r.m.s. radius.…”

Section: A Three-body Dynamicsmentioning

confidence: 99%

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Three-body continuum energy correlations in Borromean halo nuclei. II

et al. 2006

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The general properties of intrinsic energy correlations in the three-body continuum of Borromean halo nuclei are considered. A model that describes the system as a three-body α + n + n cluster structure and reproduces the experimentally known properties of 6 He and 6 Li is used to study low-lying resonances and soft modes. The intrinsic correlated structure of the 6 He continuum reveals a unique structure for three-body 2 + 1 , 2 + 2 , and 1 + 1 resonances and a lack of resonant structure in soft dipole and monopole modes.

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Section: A Three-body Dynamicsmentioning

confidence: 99%

“…The three-body dynamics has previously been successfully tested in calculations for bound and lowest excited states of the A = 6 nuclei [1,5], for calculation of the dipole strength function [9], and inelastic 6 He(n, n ) and charge-exchange 6 Li(n, p) reactions to the 6 He continuum [4,10]. The continuum and g.s.…”

Section: Introductionmentioning

confidence: 99%

Three-body continuum energy correlations in Borromean halo nuclei. II

et al. 2006

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“…The structure of the ground state and continuum excitations is calculated in a three-body model [5][6][7][8] using the method of hyperspherical harmonics. The reaction mechanisms are described within the microscopic four-body distorted wave theory [9][10][11][12][13][14][15], which has been successfully developed and used to describe different reactions with two-neutron halo nuclei.…”

Section: Introductionmentioning

confidence: 99%

Continuum spectroscopy of Borromean two-neutron halo nuclei

2006

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Energy and angular correlation distributions of the three fragments in 6 He breakup on 208 Pb at a collision energy of 240 MeV/nucleon are discussed within the microscopic four-body distorted wave model and compared with experimental data. The nuclear structure of the ground state and low-energy three-body continuum of 6 He is calculated by the method of hyperspherical harmonics within the three-body cluster model. Reflections of the fundamental permutation symmetry of the halo neutrons in angular and energy correlations are pointed out. The calculations describe the experimental data for fragment correlations near breakup threshold rather well, and the physics is contained in a few elementary modes; but with increasing excitation energy of 6 He, some striking deviations from experimental distributions are encountered. Possible reasons for this are discussed.

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“…The correlations (or momentum distributions) in the g.s. can also resemble the narrow momentum distributions of fragments measured in break-up reactions (and they can even be peaked at low excitation energies), which in reality can be caused by low-lying resonances in the three-body continuum [8,15].…”

Section: Introductionmentioning

confidence: 85%

“…The three-body model has been successfully tested in calculations of bound and lowest excited states of the A = 6 nuclei [1,4], for the calculation of inelastic 6 He(n, n ) and charge-exchange 6 Li(n, p) reactions to the 6 He continuum [7,8], and for the inelastic 11 Li(p, p ) reaction [9]. The continuum and ground state (g.s.)…”

Section: Introductionmentioning

confidence: 99%

Three-body continuum energy correlations in Borromean halo nuclei. III. Short-range external fields

et al. 2007

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Energy correlations in transitions from the bound state to the three-body continuum of Borromean halo nuclei are considered. A core+n + n three-body cluster model which reproduces the experimentally known properties of 6 He and 11 Li has been used to study the low-lying resonances and soft modes. An analysis of the correlated responses in 6 He shows that in the case of the narrow three-body 2 + 1 resonance the transition energy correlations are the same as in the intrinsic correlated structure in 3 → 3 scattering. They differ significantly for wide 2 + 2 , 1 + 1 resonances, and also for the soft dipole and monopole modes, where, due to the transition operators, the intertwining of the ground state and the three-body continuum plays a significant role.

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New Insight into Halo Fragmentation

Cited by 26 publications

References 20 publications

Three-body continuum energy correlations in Borromean halo nuclei. II

Three-body continuum energy correlations in Borromean halo nuclei. II

Continuum spectroscopy of Borromean two-neutron halo nuclei

Three-body continuum energy correlations in Borromean halo nuclei. III. Short-range external fields

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