“…The difference in the geometry of cluster's disposition in 6 He and 8 He is more likely connected with the Pauli principle. There is an effective repulsion between two dineutrons, arising from the Pauli principle, which strives to place dineutrons on different sides the α-particle.…”
Section: Resultsmentioning
confidence: 99%
“…A. Ogloblin [17] indicated the importance of a cluster configuration α + 4n. He pointed out that the bound energy of two neutrons in 8 He is two times larger than that in 6 He. This fact led him to the conclusion that 6 He cannot serve as a core and the neutron halo in 8 He has to be consisted of four neutrons.…”
Section: Introductionmentioning
confidence: 99%
“…A number of unexpected properties were discovered in those nuclei, for instance, a neutron halo. It is natural that many attempts were undertook to explain those properties within microscopic and semi-microscopic methods [1,2,3,4,5,6,7,8].…”
The structure of 8 He is investigated within a three-cluster microscopic model. The three-cluster configuration α + 2 n + 2 n was used to describe the properties of the ground state of the nucleus. The obtained results evidently indicate the existence of a neutron halo in 8 He.
“…The difference in the geometry of cluster's disposition in 6 He and 8 He is more likely connected with the Pauli principle. There is an effective repulsion between two dineutrons, arising from the Pauli principle, which strives to place dineutrons on different sides the α-particle.…”
Section: Resultsmentioning
confidence: 99%
“…A. Ogloblin [17] indicated the importance of a cluster configuration α + 4n. He pointed out that the bound energy of two neutrons in 8 He is two times larger than that in 6 He. This fact led him to the conclusion that 6 He cannot serve as a core and the neutron halo in 8 He has to be consisted of four neutrons.…”
Section: Introductionmentioning
confidence: 99%
“…A number of unexpected properties were discovered in those nuclei, for instance, a neutron halo. It is natural that many attempts were undertook to explain those properties within microscopic and semi-microscopic methods [1,2,3,4,5,6,7,8].…”
The structure of 8 He is investigated within a three-cluster microscopic model. The three-cluster configuration α + 2 n + 2 n was used to describe the properties of the ground state of the nucleus. The obtained results evidently indicate the existence of a neutron halo in 8 He.
“…The theoretical model of this work is the same as was previously used for the discrete spectrum [10] and continuum [11] studies in a three-body approach. It was applied to 16 Ne and its isobaric mirror partner 16 C in Refs.…”
The dynamic mechanism of the Thomas-Ehrman shift in three-cluster systems is studied by example of 16 Ne and 16 C isobaric mirror partners. We predict configuration mixings for 0 + and 2 + states in 16 Ne and 16 C. Large isospin symmetry breaking on the level of wave function component weights is demonstrated for these states and discussed as three-body mechanism of Thomas-Ehrman shift. It is shown that the description of the Coulomb displacement energies requires a consistency among three parameters: the 16 Ne decay energy ET , the 15 F ground state energy Er, and the configuration mixing parameters for the 16 Ne/ 16 C 0 + and 2 + states. Basing on this analysis we infer the 15 F 1/2 + ground state energy to be Er = 1.39 − 1.42 MeV.
“…By simulation based on the developed model [12,13] and the method [5], the spectrum in figure 1(b) has been reproduced well in the whole energy and angular ranges. Figure 2 shows typical examples of the fits of the experimental spectra measured at 10 o , 60 o and 170 o in the c.m.…”
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