Two-neutron correlations in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">He</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>in a Coulomb breakup reaction

Kikuchi, Yoshihiro; Katō, Kiyoshi; Myo, Takayuki; Takashina, Masaaki; Ikeda, Kiyomi

doi:10.1103/physrevc.81.044308

Cited by 59 publications

(86 citation statements)

References 41 publications

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“…Results for light nuclei using CSM have been obtained successfully for energies, decay widths, and spectroscopic factors, and also for breakup strengths induced by Coulomb excitations [25,26], monopole transition [21] and one-neutron removal [20]. Recently, CSM has been developed to include nuclear reaction methods such as scattering amplitude calculation [27], the Lippmann-Schwinger equation [28], and the continuum-discretized coupled-channel (CDCC) method [29].…”

Section: Introductionmentioning

confidence: 99%

Four-body resonances of7B using the complex scaling method

2011

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We study the resonance spectroscopy of the proton-rich nucleus 7 B in the 4 He + p + p + p cluster model. Many-body resonances are treated under the correct boundary condition as Gamow states using the complex scaling method. We predict five resonances of 7 B and evaluate the spectroscopic factors of the 6 Be-p components. The importance of the 6 Be(2 + )-p component is shown in several states of 7 B; this is a common feature of 7 He, a mirror nucleus of 7 B. For only the ground state of 7 B, the mixing of the 6 Be(2 + ) state is larger than that of 6 He(2 + ) in 7 He, which indicates a breaking of mirror symmetry. This is caused by the small energy difference between 7 B and the excited 6 Be(2 + ) state, the origin of which is Coulomb repulsion.

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Section: Introductionmentioning

confidence: 99%

Four-body resonances of7B using the complex scaling method

2011

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“…In CSLS the Lippmann-Schwinger formalism is combined with the complex scaling method (CSM) [8]; CSLS allows an accurate description of decay of manybody systems. Then CSLS was applied to the Coulomb breakup of 6 He by 208 Pb at 250 MeV/nucleon to study a possible correspondence between breakup observables and the di-neutron correlation in the ground state of 6 He [7]. This work can also be interpreted as an investigation of the decay mode of the nonresonant 1 − state of 6 He excited by 208 Pb.…”

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confidence: 99%

“…The main conclusion of Ref. [7] was the dominance of the sequential decay through 5 He governed by the final state interaction (FSI). Another important finding was a peak in the 2n invariant mass spectrum.…”

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Two neutron decay from the21+state of6He

et al. 2013

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Decay mode of the 2 + 1 resonant state of 6 He populated by the 6 He breakup reaction by 12 C at 240 MeV/nucleon is investigated. The continuum-discretized coupled-channels method is adopted to describe the formation of the 2 + 1 state, whereas its decay is described by the complex-scaled solutions of the Lippmann-Schwinger equation. From analysis of invariant mass spectra with respect to the α-n and n-n subsystems, coexistence of two decay modes is found. One is the simultaneous decay of two neutrons correlating with each other and the other is the emission of two neutrons to the opposite directions. The latter is found to be free from the final state interaction and suggests existence of a di-neutron in the 2 + 1 state of 6 He.

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“…Results for light nuclei using CSM have been obtained successfully for energies, decay widths, spectroscopic factors, and for the breakup strengths induced by the Coulomb excitations [28,29], monopole transition [24], and one-neutron removal [23]. Recently, CSM has been developed to apply to the nuclear reaction methods such as the scattering amplitude calculation [30], Lippmann-Schwinger equation [31,32], and the continuum-discretized coupledchannels (CDCC) method [33].…”

Section: Introductionmentioning

confidence: 99%

Five-body resonances of8C using the complex scaling method

2012

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We study the resonance spectroscopy of the proton-rich nucleus 8 C in the α + p + p + p + p cluster model. Many-body resonances are treated on the correct boundary condition as the Gamow states using the complex scaling method. We obtain the ground state of 8 C as a five-body resonance for the first time, which has dominantly the subclosed (p 3/2 ) 4 configuration and agrees with the recent experiment for energy and decay width. We predict the second 0 + state with the excitation energy of 5.6 MeV, which corresponds to the 2p2h state from the ground state. We evaluate the occupation numbers of four valence-protons in the 8 C states and also the J π distribution of proton-pair numbers of the two 0 + states of 8 C. The ground state involves a large amount of the 2 + proton-pair fraction, while the excited 0 + 2 state almost consists of two of the 0 + proton pairs, which can be understood from the (p 3/2 ) 2 (p 1/2 ) 2 configuration. We also discuss the mirror symmetry between 8 C and 8 He with an α+four nucleon picture. It is found that the 0 + states retain the mirror symmetry well for the configuration properties of two nuclei.

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Two-neutron correlations inHe6in a Coulomb breakup reaction

Cited by 59 publications

References 41 publications

Four-body resonances of7B using the complex scaling method

Four-body resonances of7B using the complex scaling method

Two neutron decay from the21+state of6He

Five-body resonances of8C using the complex scaling method

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