After some time, we check how many neutrons remain in the trap. From that number and the initial number of neutrons, we can evaluate the decay rate of the neutrons, and thus the neutron lifetime.

This took me back to my ‘Nuclear Physics’ classes which was one of the most difficult classes to pass 😊. But nowadays I think I miss those times a little. Thank you for this nostalgic moment you gave to me and thanks for this informative post.