Gauge Invariant Evaluation of Nuclear Polarization with Collective Model
نویسندگان
چکیده
The nuclear-polarization (NP) energies for hydrogenlike heavy ions are calculated using the same collective model employed in [1, 2]. The transverse, as well as the Coulomb contributions, are considered in both the Feynman and Coulomb gauges. A considerable gauge violation is found when the ladder and cross diagrams only are taken into account. A schematic nuclear model with a separable interaction between nucleons gives the same transition densities of charge as those of the collective model employed. Using this equivalence, NP energy shifts with the collective model are gauge invariantly evaluated for the 1s1/2 states in 208 82Pb 81+ and 238 92U . PACS number(s): 31.30-i, 31.30.Jv, 21.60.Ev, 12.20.Ds
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