Limits on Pauli principle violation by nucleons

We consider nuclei produced in core collapse supernovas and subjected to a high neutron flux. We show that an accelerator mass spectrometry experiment that searches for traces of anomalous iron isotopes could set limits of the order of ${10}^{-20}–{10}^{-25}$ on (or perhaps discover) Pauli principle violation by neutrons. A similar search for anomalous Co isotopes could set limits in the range ${10}^{-13}–{10}^{-18}$ on Pauli principle violation by protons. We show that existing data on oxygen can be used to set a limit of about ${10}^{-17}$ in one proposed model of such violation.