Nature of the first excited state of He-4
| dc.creator | Csoto, Attila | |
| dc.creator | Hale, G. M. | |
| dc.date | 1997-01-02 | |
| dc.date.accessioned | 2026-07-07T11:11:03Z | |
| dc.date.available | 2026-07-07T11:11:03Z | |
| dc.description | We study the first excited state of He4 in a microscopic {H3+p,He3+n} cluster model, including H3 and He3 distortions. The phenomenological 1S0 H3+p scattering phase shift is well reproduced. We localize a complex pole of the S-matrix between the H3+p and He3+n thresholds. The corresponding resonance parameters are E_r=93 keV position relative to H3+p, and Gamma=390 keV width. A pole search is also performed in an extended R-matrix method, and a resonance is found with parameters E_r=114 keV and Gamma=392 keV. The R-matrix approach gives several additional poles, some of which may be connected with an enhanced threshold effect. | |
| dc.description | 13 pages, 2 figures | |
| dc.identifier | https://arxiv.org/abs/nucl-th/9701006 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/9701006 | |
| dc.identifier | Phys.Rev.C55:2366-2372,1997 | |
| dc.identifier | doi:10.1103/PhysRevC.55.2366 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/190964 | |
| dc.subject | Nuclear Theory | |
| dc.title | Nature of the first excited state of He-4 | |
| dc.type | text |