Does crystal-specific NaI(Tl) response hide a DAMA-only signal?

The sodium recoil quenching factor $Q_{\mathrm{Na}}(E_{R})$ in NaI(Tl) converts nuclear recoil energy to electron-equivalent energy and has been measured between roughly 0.1 and 0.3 for $E_{R} \sim 10-100\, \mathrm{keV}$, with dependence on thallium concentration. The question is the value of $Q_{\mathrm{Na}}(E_{R})$ and of the near-threshold light yield for DAMA's own crystals, and whether any value within that range brings the DAMA modulation into agreement with COSINE-100 and ANAIS-112 when compared at equal nuclear recoil energy rather than equal electron-equivalent energy.

A direct neutron-beam quenching-factor measurement on a DAMA-equivalent crystal (same supplier, Tl concentration and growth), followed by a recoil-energy-matched comparison of the three experiments.