Elsevier

Nuclear Physics A

Volume 451, Issue 2, 24 March 1986, Pages 189-201
Nuclear Physics A

Droplet-model electric dipole moments

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Abstract

We present a calculation of the macroscopic contribution to the dipole moment of a deformed (axially symmetric but reflection asymmetric) nucleus, using the droplet model. In addition to the familiar charge redistribution effect (which is worked out including a correction for the relative neutron excess (N - Z)/ A and a second correction, of relative order A13, the droplet model predicts a contribution from the presence of a neutron skin. This contribution turns out to be of the same order as the redistribution effect and of opposite sign. The result is a reduction of the macroscopic contribution to the dipole moment to small or even negative values, as compared with earlier estimates. All the formulae are worked out for a nuclear shape specified by an arbitrary number of Legendre polynomials.

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This work was supported in part by the Director, Office of Energy Research, Division of Nuclear Physics of the Office of High Energy and Nuclear Physics of the US Department of Energy under contract DE-AC03-76SF00098.

a

Permanent address: Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina.

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