It is very hard to uniquely identify neutrino interactions among the natural background of radioactivity.
The neutrino interaction with matter was so weak that detecting it proved a severe experimental challenge, and was not accomplished until 1956.
Using the electronic information, possible neutrino interactions were identified and selected for further analysis.
By connecting these dots across subsequent sheets, the path that each particle had taken was reconstructed and likely neutrino interactions identified.
It may take you a few months before you can convince yourself that you've actually seen neutrino interactions.
The observation of neutrino interactions requires a large detector mass, along with a sensitive amplification system.
They record upward going muons in charged current muon neutrino interactions.
To have an idea: A) Opera collected 16000 neutrino interactions with a specialised detector in about 3 years of running.
The experiment observed the light produced by relativistic electrons in the water created by neutrino interactions.
The experiment was designed to study deep inelastic neutrino interactions in iron.