We discuss a method to obtain an effective oxygen target within a low-density detector allowing an accurate characterization of the various event topologies in () -oxygen interactions. Results can be of interest for long-baseline neutrino oscillation experiments utilizing water targets. In particular, the combination of both oxygen and hydrogen targets within the same detector can provide in situ measurements of nuclear effects and of the (anti) neutrino flux, which are the leading sources of systematic uncertainties in long-baseline oscillation analyses. These measurements can also provide useful information about the nuclear modifications of bound nucleons, as well as about the isospin symmetry in nucleons and nuclei.
R. Petti (Sun,) studied this question.