TY - JOUR
T1 - Photonuclear sum rules and the tetrahedral configuration of He4
AU - Gazit, Doron
AU - Barnea, Nir
AU - Bacca, Sonia
AU - Leidemann, Winfried
AU - Orlandini, Giuseppina
PY - 2006
Y1 - 2006
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=33845548417&partnerID=8YFLogxK
U2 - 10.1103/PhysRevC.74.061001
DO - 10.1103/PhysRevC.74.061001
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AN - SCOPUS:33845548417
SN - 0556-2813
VL - 74
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
IS - 6
M1 - 061001
ER -