Photonuclear sum rules and the tetrahedral configuration of He4

Doron Gazit*, Nir Barnea, Sonia Bacca, Winfried Leidemann, Giuseppina Orlandini

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Three well-known photonuclear sum rules (SR), i.e., the Thomas-Reiche-Kuhn, the bremsstrahlungs and the polarizability SR are calculated for He4 with the realistic nucleon-nucleon potential Argonne V18 and the three-nucleon force Urbana IX. The relation between these sum rules and the corresponding energy weighted integrals of the cross section is discussed. Two additional equivalences for the bremsstrahlungs SR are given, which connect it to the proton-neutron and neutron-neutron distances. Using them, together with our result for the bremsstrahlungs SR, we find a deviation from the tetrahedral symmetry of the spatial configuration of He4. The possibility to access this deviation experimentally is discussed.

Original languageAmerican English
Article number061001
JournalPhysical Review C - Nuclear Physics
Issue number6
StatePublished - 2006


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