Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2008-01-21
Phys.Rev.C77:024001,2008
Physics
Nuclear Physics
Nuclear Theory
11 pages, 3 figures, 2 tables
Scientific paper
10.1103/PhysRevC.77.024001
We derive general expressions for non-energy weighted and energy-weighted cluster sum rules for systems of three charged particles. The interferences between pairs of particles are found to play a substantial role. The energy-weighted sum rule is usually determined by the kinetic energy operator, but we demonstrate that it has similar additional contributions from the angular momentum and parity dependence of two- and three-body potentials frequently used in three-body calculations. The importance of the different contributions is illustrated with the dipole excitations in $^6$He. The results are compared with the available experimental data.
de Diego R.
Fedorov Dmitry V.
Garrido E.
Jensen Andreas Schmidt
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