alpha-particle photoabsorption with a realistic nuclear force

Details alpha-particle photoabsorption with a realistic nuclear force alpha-particle photoabsorption with a realistic nuclear force

2005-12-12

arxiv.org/abs/nucl-th/0512038v2

Phys.Rev.Lett.96:112301,2006

Physics

Nuclear Physics

Nuclear Theory

13 pages, 4 figures; corrected experimental data in Fig.4b and slightly modified discussion of Fig.4b

Scientific paper

10.1103/PhysRevLett.96.112301

The 4He total photoabsorption cross section is calculated with the realistic nucleon-nucleon potential Argonne V18 and the three-nucleon force (3NF) Urbana IX. Final state interaction is included rigorously via the Lorentz Integral Transform method. A rather pronounced giant resonance with peak cross sections of 3 (3.2) mb is obtained with (without) 3NF. Above 50 MeV strong 3NF effects, up to 35%, are present. Good agreement with experiment is found close to threshold. A comparison in the giant resonance region is inconclusive, since present data do not show a unique picture.

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