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Using the coherent elastic neutrino-nucleus scattering data of the COHERENT experiment, we determine for the first time the average neutron rms radius of ^133Cs and ^127I. We obtain the practically model-independent value R₍=5. 5-₁. ₁^+0. 9 fm using the symmetrized Fermi and Helm form factors. We also point out that the COHERENT data show a 2. 3σ evidence of the nuclear structure suppression of the full coherence.
Cadeddu et al. (Tue,) studied this question.