2000/10/23 by Nir Barnea, V.D. Efros, Victor D. Efros +2 · 1 citation
Physics and Astronomy · #Advanced Chemical Physics Studies #Nuclear physics research studies #Quantum, superfluid, helium dynamics #nucl-th
paper · pdf · doi:10.1103/physrevc.63.057002
published as Phys.Rev. C63 (2001) 057002 · LaTeX, 7 pages, 3 ps figures
arxiv created 2000/10/23 · openalex publication_date 2001/04/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Two conceptually different hyperspherical harmonics expansions are used for the calculation of the total 4He photoabsorption cross section. Besides the well-known method of correlated hyperspherical harmonics, the recently introduced effective interaction approach for the hyperspherical formalism is applied. Semirealistic NN potentials are employed and final-state interaction is fully taken into account via the Lorentz integral transform method. The results show that the effective interaction leads to a very good convergence, while the correlation method exhibits a less rapid convergence in the giant dipole resonance region. The rather strong discrepancy with the experimental photodisintegration cross sections is confirmed by the present calculations.