Atomic parity nonconservation and neutron radii in cesium isotopes

Details Atomic parity nonconservation and neutron radii in cesium isotopes Atomic parity nonconservation and neutron radii in cesium isotopes

1993-03-05

arxiv.org/abs/nucl-th/9303003v2

Phys.Rev.C48:1392-1400,1993

Physics

Nuclear Physics

Nuclear Theory

24 pages (RevTeX) 4 figures (Postscript/uuencoded compressed) Caltech Preprint No. MAP-153 (March 1993)

Scientific paper

10.1103/PhysRevC.48.1392

The interpretation of future precise experiments on atomic parity violation in terms of parameters of the Standard Model could be hampered by uncertainties in the atomic and nuclear structure. While the former can be overcome by measurement in a series of isotopes, the nuclear structure requires knowledge of the neutron density. We use the nuclear Hartree-Fock method, which includes deformation effects, to calculate the proton and neutron densities in {125}Cs-{139}Cs. We argue that the good agreement with the experimental charge radii, binding energies, and ground state spins signifies that the phenomenological nuclear force and the method of calculation that we use is adequate. Based on this agreement, and on calculations involving different effective interactions, we estimate the uncertainties in the differences of the neutron radii delta_{N,N'} and conclude that they cause uncertainties in the ratio of weak charges, the quantities determined in the atomic parity nonconservation experiments, of less than 10^{-3}. Such an uncertainty is smaller than the anticipated experimental error.

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