Isomeric <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msup><mml:mn>0</mml:mn><mml:mo>−</mml:mo></mml:msup></mml:math> halo-states in 12Be and 11Li

Romero-Redondo, Carolina; Garrido, E.; Fedorov, D. V.; Jensen, A. S.

doi:10.1016/j.physletb.2007.12.014

Cited by 16 publications

(67 citation statements)

References 39 publications

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“…1 is sufficiently strong to support the bound state suggested in Ref. [37], although no experimental evidence of it has been found so far. The reason for this can be because its population in reactions is extremely small or because it is hidden behind the other states or because it is for some reason pushed up into the continuum.…”

Section: Bound-state and Resonance Energiesmentioning

confidence: 52%

“…[27]. In precisely the same framework a 0 − state was also found [37]. So far, this state has not been seen in experiments.…”

Section: Bound-state and Resonance Energiesmentioning

confidence: 56%

“…Beside the bound (halo) states in 12 Be, a 0 − state has been suggested [37,38]; although it has been looked for in experiments so far it has not been found as a bound state. The structure of the effective potentials in the three-body problem of 12 Be( 10 Be + n + n) is complicated, suggesting more excited states than the known bound states.…”

Section: Introductionmentioning

confidence: 99%

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Three-body properties of low-lying12Be resonances

et al. 2012

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We compute the three-body structure of the lowest resonances of 12 Be considered as two neutrons around an inert 10 Be core. This is an extension of the bound-state calculations of 12 Be into the continuum spectrum. We investigate the lowest resonances of angular momenta and parities, 0 ± , 1 − , and 2 + . Surprisingly enough, they all are naturally occurring in the three-body model. We calculate bulk structure dominated by small-distance properties as well as decays determined by the asymptotic large-distance structure. Both 0 + and 2 + have two-body 10 Be-neutron d-wave structure, while 1 − has an even mixture of p and d waves. The corresponding relative neutron-neutron partial waves are distributed among s, p, and d waves. The branching ratios show different mixtures of one-neutron emission, three-body direct, and sequential decays. We argue for spin and parities 0 + , 1 − , and 2 + for the resonances at 0.89, 2.03, and 5.13, respectively. The computed structures are in agreement with existing reaction measurements.

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Section: Bound-state and Resonance Energiesmentioning

confidence: 52%

“…[27]. In precisely the same framework a 0 − state was also found [37]. So far, this state has not been seen in experiments.…”

Section: Bound-state and Resonance Energiesmentioning

confidence: 56%

Section: Introductionmentioning

confidence: 99%

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Three-body properties of low-lying12Be resonances

et al. 2012

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“…from the 1 − 1 state only in spin coupling has been suggested: a 0 − 1 state with an excitation energy around E * = 2.5 MeV [29]. However, this state has never been seen experimentally.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of bound states in12Be through low-energy11Be(d,p)
Johansen¹,
Bildstein²,
Borge³
et al. 2013
Phys. Rev. C
29
3
18
0
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The bound states of 12 Be have been studied through a 11 Be(d,p) 12 Be transfer reaction experiment in inverse kinematics. A 2.8 MeV/u beam of 11 Be was produced using the REX-ISOLDE facility at CERN. The outgoing protons were detected with the T-REX silicon detector array. The MINIBALL germanium array was used to detect gamma rays from the excited states in 12 Be. The gamma-ray detection enabled a clear identification of the four known bound states in 12 Be, and each of the states has been studied individually. Differential cross sections over a large angular range have been extracted. Spectroscopic factors for each of the states have been determined from distorted wave Born approximation (DWBA) calculations and have been compared to previous experimental and theoretical results.

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“…This model was successfully used to describe the four known bound states [3], and it suggested that a 0 − structure should exist [4]. This three-body model rather naturally describes the bound spectrum within the space of 0 ± , 1 ± , and 2 ± states.…”

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confidence: 99%

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et al. 2013

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We suggested that the two resonances at 0.89 and 2.03 MeV above the two-neutron separation threshold have spins and parities of 0 + and 1 − . In the Comment, Fortune claims that these states almost unambiguously must be 3 − and 4 + states. We work in three-body cluster models with J π = 0 + , 1 − , 2 + where all three-body continuum structures are included. Fortune bases his assignments on the bound-state shell-model and (t,p) calculations. Our conclusions are from three-body structure results including widths. Assignments as 0 + and 1 − (or, perhaps, 3 − ) resonances are the most natural within the three-body cluster model.

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Isomeric 0− halo-states in 12Be and 11Li

Cited by 16 publications

References 39 publications

Three-body properties of low-lying12Be resonances

Three-body properties of low-lying12Be resonances

Experimental study of bound states in12Be through low-energy11Be(d,p)
Johansen¹,
Bildstein²,
Borge³
et al. 2013
Phys. Rev. C
29
3
18
0
View full text Add to dashboard Cite

Reply to “Comment on ‘Three-body properties of low-lying12Beresonances’ ”

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Isomeric 0− halo-states in 12Be and 11Li

Cited by 16 publications

References 39 publications

Three-body properties of low-lying12Be resonances

Three-body properties of low-lying12Be resonances

Experimental study of bound states in12Be through low-energy11Be(d,p)Johansen1, Bildstein2, Borge3 et al. 2013Phys. Rev. C293180View full textAdd to dashboardCite

Reply to “Comment on ‘Three-body properties of low-lying12Beresonances’ ”

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Experimental study of bound states in12Be through low-energy11Be(d,p)
Johansen¹,
Bildstein²,
Borge³
et al. 2013
Phys. Rev. C
29
3
18
0
View full text Add to dashboard Cite