Question

A beam of π⁺ mesons of energy 1GeV has an intensity of 10⁶ particles per sec at the beginning of a 10 m flight path. Calculate the intensity of the neutrino flux at the end of the flight path (mass of π meson = 139 MeV/c², lifetime = 2.56 × 10⁻⁸s)

Answer 1

Using the above values, we find I = 83