Speaker
Description
Electron-neutrino charged-current interactions on iodine have been proposed for solar and supernova neutrino detection, owing to the large predicted cross section. Using a 185-kg NaI[Tl] array, COHERENT has measured the inclusive electron-neutrino charged-current cross section on ${}^{127}$I with pion decay-at-rest neutrinos produced by the Spallation Neutron Source at Oak Ridge National Laboratory. The measured inclusive cross section of 9.2$^{+2.1}_{−1.8} \times 10^{−40}$ cm$^2$ is roughly 41% lower than predicted using the MARLEY event generator with a measured Gamow-Teller strength distribution. The neutron-emission channel appears to be a significant source of disagreement between results and predictions, in agreement COHERENT data of charged-current neutrino-induced neutron production on lead, indicating further improvements are needed in the modeling on low-energy neutrino interactions with heavy nuclei. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
| Poster prize | Yes |
|---|---|
| Given name | Samuel |
| Surname | Hedges |
| First affiliation | Lawrence Livermore National Laboratory |
| Institutional email | hedges3@llnl.gov |
| Gender | Male |
| Collaboration (if any) | COHERENT |
