| Autor: |
Lovell A.E., Nunes F.M., Thompson I.J |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
|
| Zdroj: |
EPJ Web of Conferences, Vol 113, p 06015 (2016) |
| Druh dokumentu: |
article |
| ISSN: |
2100-014X |
| DOI: |
10.1051/epjconf/201611306015 |
| Popis: |
Recently, the first example of two-neutron decay from the ground state of an unbound nucleus, 16Be, was seen (A. Spyrou, et. al., Phys. Rev. Lett. 108 102501 (2012)). Three-body methods are ideal for exactly treating the degrees of freedom important for these decays. Using a basis expansion over hyperspherical harmonics and the hyperspherical R-matrix method, we construct a realistic model of 16Be in order to investigate its decay mode and the role of the two-neutron interaction. The neutron-14Be interaction is constrained using shell model predictions. We obtain a ground state for 16Be that is under-bound by approximately 0.7 MeV with a width of approximately 0.17 MeV. For such a system, an attractive three-body force must be included to reproduce the experimental ground state energy. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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