Sub-threshold resonances in few-neutron systems
| dc.creator | Sofianos, S. A. | |
| dc.creator | Rakityansky, S. A. | |
| dc.creator | Vermaak, G. P. | |
| dc.date | 1997-05-08 | |
| dc.date.accessioned | 2026-07-07T10:58:59Z | |
| dc.date.available | 2026-07-07T10:58:59Z | |
| dc.description | Three- and four-neutron systems are studied within the framework of the hyperspherical approach with a local S-wave nn-potential. Possible bound and resonant states of these systems are sought as zeros of three- and four-body Jost functions in the complex momentum plane. It is found that zeros closest to the origin correspond to sub-threshold (nnn) (1/2-) and (nnnn) (0+) resonant states. The positions of these zeros turned out to be sensitive to the choice of the $nn$--potential. For the Malfliet- Tjon potential they are E(nnn)=-4.9-i6.9 (MeV) and E(nnnn)=-2.6-i9.0 (MeV). Movement of the zeros with an artificial increase of the potential strength also shows an extreme sensitivity to the choice of potential. Thus, to generate ^3n and ^4n bound states, the Yukawa potential needs to be multiplied by 2.67 and 2.32 respectively, while for the Malfliet-Tjon potential the required multiplicative factors are 4.04 and 3.59. | |
| dc.description | Latex, 22 pages, no PS-figures, submitted to J.Phys.G | |
| dc.identifier | https://arxiv.org/abs/nucl-th/9705016 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/9705016 | |
| dc.identifier | J.Phys.G23:1619-1630,1997 | |
| dc.identifier | doi:10.1088/0954-3899/23/11/010 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/187297 | |
| dc.subject | Nuclear Theory | |
| dc.title | Sub-threshold resonances in few-neutron systems | |
| dc.type | text |