Neutron back scattering for the search of the Battle of Anghiari

The 'Battle of Anghiari' is a wall painting made by Leonardo Da Vinci around 1505. Its present day location is unknown but some indications suggest that the mural might be concealed behind a brick wall. Test measurements are presented demonstrating that neutron back scattering (NBS) can be used to search through the wall for the painting. NBS is a non-destructive technique to establish the presence of the hydrogen contained in the painting materials that were probably used by Da Vinci.