2010/08/25 by R. Álvarez-Rodríguez, R. Alvarez-Rodriguez, A. S. Jensen +2
Physics and Astronomy · #Adiabatic process #Angular momentum #Atomic and Molecular Physics #Atomic physics #Momentum (technical analysis) #Neutron #Nuclear physics #Nuclear physics research studies #Parity (physics) #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #nucl-th
paper · pdf · doi:10.1103/physrevc.82.034001
published as Phys.Rev.C82:034001,2010 · 12 pages, 10 figures. To appear in Physical Review C
arxiv created 2010/08/25 · openalex publication_date 2010/09/09 · arxiv updated 2014/11/21 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The complex-rotated hyperspherical adiabatic method is used to study the decay of low-lying 9Be resonances into one neutron and two \ensuremathα particles. We investigate the six resonances above the breakup threshold and below 6 MeV: 1/2^\ifmmode±\else\textpm\fi, 3/2^\ifmmode±\else\textpm\fi, and 5/2^\ifmmode±\else\textpm\fi. The short-distance properties of each resonance are studied, and the different angular momentum and parity configurations of the 8Be and 5He two-body substructures are determined. We compute the branching ratio for sequential decay via the 8Be ground state, which qualitatively is consistent with measurements. We extract the momentum distributions after decay directly into the three-body continuum from the large-distance asymptotic structures. The kinematically complete results are presented as Dalitz plots as well as projections on given neutron and \ensuremathα energy. The distributions are discussed and, in most cases, found to agree with available experimental data.