1997/01/02 by Attila Csótó, Attila Csoto, G. M. Hale · 2 citations
Physics and Astronomy · #Advanced Chemical Physics Studies #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #nucl-th
paper · pdf · doi:10.1103/physrevc.55.2366
published as Phys.Rev.C55:2366-2372,1997 · 13 pages, 2 figures
arxiv created 1997/01/02 · openalex publication_date 1997/05/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the first excited state of 4He in a microscopic 3H+p,3He+n cluster model, including 3H and 3He distortions. The phenomenological 1S0 3H+p scattering phase shift is reasonably well reproduced. We localize a complex pole of the S matrix between the 3H+p and 3He+n thresholds. The corresponding resonance parameters are Er=93 keV position relative to 3H+p, and \ensuremathΓ=390 keV width. A pole search is also performed in an extended R-matrix method, and a resonance is found with parameters Er=114 keV and \ensuremathΓ=392 keV. The R-matrix approach gives several additional poles, some of which may be connected with an enhanced threshold effect.