Two-Neutron Halo is Unveiled in 29F
We report the measurement of reaction cross sections (σexR) of 27, 29F with a carbon target at RIKEN. The unexpectedly large σexR and derived matter radius identify 29F as the heaviest two-neutron Borromean halo to date. The halo is attributed to neutrons occupying the 2p3/2 orbital, thereby vanishi...
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| Veröffentlicht in: | Physical review letters 2020-06, Vol.124 (22), p.1 |
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| creator | Bagchi, S |
| description | We report the measurement of reaction cross sections (σexR) of 27, 29F with a carbon target at RIKEN. The unexpectedly large σexR and derived matter radius identify 29F as the heaviest two-neutron Borromean halo to date. The halo is attributed to neutrons occupying the 2p3/2 orbital, thereby vanishing the shell closure associated with the neutron number N = 20. The results are explained by state-of-the-art shell model calculations. Coupled-cluster computations based on effective field theories of the strong nuclear force describe the matter radius of 27 F but are challenged for 29F. |
| doi_str_mv | 10.1103/PhysRevLett.124.222504 |
| format | Article |
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The unexpectedly large σexR and derived matter radius identify 29F as the heaviest two-neutron Borromean halo to date. The halo is attributed to neutrons occupying the 2p3/2 orbital, thereby vanishing the shell closure associated with the neutron number N = 20. The results are explained by state-of-the-art shell model calculations. 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| language | eng |
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| title | Two-Neutron Halo is Unveiled in 29F |
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