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Robertson, R. G. H.; Martin, S.; Falk, W.R.; Ingham, D.; Djaloeis, A.

doi:10.1103/physrevlett.32.1207

Cited by 37 publications

(67 citation statements)

References 8 publications

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“…[20][21][22] As in the present work, the experimental resolution was significant. The 8 C ground state is quite unusual in having a five-particle exit channel.…”

Section: Asupporting

confidence: 49%

Investigations of three-, four-, and five-particle decay channels of levels in light nuclei created using aC9beam

et al. 2011

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The interactions of a E/A=70-MeV 9 C beam with a Be target was used to populate levels in Be, B, and C isotopes which undergo decay into many-particle exit channels. The decay products were detected in the HiRA array and the level energies were identified from their invariant mass. Correlations between the decay products were examined to deduce the nature of the decays, specifically to what extent all the fragments were created in one prompt step or whether the disintegration proceeded in a sequential fashion through long-lived intermediate states. In the latter case, information on the spin of the level was also obtained. Of particular interest is the 5-body decay of the 8 C ground state which was found to disintegrate in two steps of two-proton decay passing through the 6 Beg.s. intermediate state. The isobaric analog of 8 Cg.s. in 8 B was also found to undergo two-proton decay to the isobaric analog of 6 Beg.s. in 6 Li. A 9.69-MeV state in 10 C was found to undergo prompt 4-body decay to the 2p+2α exit channel. The two protons were found to have a strong enhancement in the diproton region and the relative energies of all four p-α pairs were consistent with the 5 Lig.s. resonance.

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“…[20][21][22] As in the present work, the experimental resolution was significant. The 8 C ground state is quite unusual in having a five-particle exit channel.…”

Section: Asupporting

confidence: 49%

Investigations of three-, four-, and five-particle decay channels of levels in light nuclei created using aC9beam

et al. 2011

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“…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.…”

supporting

confidence: 65%

“…Recently, the new experiments on 8 C have been reported [2,3] in addition to the old observations [4][5][6]. The 8 C nucleus is known as an unbound system beyond the proton drip-line and its ground state is naively considered to be the 0 + resonance.…”

Section: Introductionmentioning

confidence: 99%

“…The ground state of 8 C is observed at 2 MeV above the 6 Be + 2p threshold energy and is close to the 7 B + p threshold [3], and excited states have not yet been observed. The 8 C states can decay not only to a two-body 7 B + p channel but also to many-body channels of 6 Be + 2p, 5 Li + 3p, and 4 He + 4p. This multiparticle decay condition makes difficulty to identify the states of 8 The mirror nucleus of 8 C is 8 He with isospin T = 2, which has the bound ground state.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, many experiments on 8 He have been reported [7][8][9][10][11][12][13]. Its ground state is considered to have a neutron skin structure consisting of four valence neutrons around 4 He with the small binding energy of 3.1 MeV. For the excited states of 8 He, most of them can be located above the 4 He + 4n threshold energy [10].…”

Section: Introductionmentioning

confidence: 99%

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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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Proton-Rich Light Nuclei

Äystö

Cerny²

1989

Treatise on Heavy Ion Science

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Highly Proton-RichTz=−2Nuclides:C8

Cited by 37 publications

References 8 publications

Investigations of three-, four-, and five-particle decay channels of levels in light nuclei created using aC9beam

Investigations of three-, four-, and five-particle decay channels of levels in light nuclei created using aC9beam

Five-body resonances of8C using the complex scaling method

Proton-Rich Light Nuclei

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