Photonuclear sum rules and the tetrahedral configuration of $^4$He

Details Photonuclear sum rules and the tetrahedral configuration of $^4$He Photonuclear sum rules and the tetrahedral configuration of $^4$He

2006-10-09

arxiv.org/abs/nucl-th/0610025v1

Phys.Rev.C74:061001,2006

Physics

Nuclear Physics

Nuclear Theory

13 pages, 1 table

Scientific paper

10.1103/PhysRevC.74.061001

Three well known photonuclear sum rules (SR), i.e. the Thomas-Reiche-Kuhn, the bremsstrahlungs and the polarizability SR are calculated for 4He 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 4He. The possibility to access this deviation experimentally is discussed.

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