Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2008-06-25
Eur.Phys.J.A39:107-116,2009
Physics
Nuclear Physics
Nuclear Theory
Accepted in EPJA
Scientific paper
10.1140/epja/i2008-10685-3
Mirror isobars $^7$Li and $^7$Be are investigated in a dicluster model. The magnetic dipole moments and the magnetic dipole response to the continuum are calculated in this framework. The magnetic contribution is found to be small with respect to electric dipole and quadrupole excitations even at astrophysical energies, at a variance with the case of deuteron. Energy weighted molecular sum rules are evaluated and a formula for the molecular magnetic dipole sum rule is found which matches the numerical calculations. Cross-sections for photo-dissociation and radiative capture as well as the S-factor for reactions of astrophysical significance are calculated with good agreement with known experimental data.
Chatterjee Rajdeep
Fortunato Lorenzo
Mason Alan
Vitturi Andrea
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