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We present a comprehensive simulation study of the Newtonian and quantummodel of a Stern-Gerlach experiment with cold neutrons.By solving Newton'sequation of motion and the time-dependent Pauli equation, for a wide range ofuniform magnetic field strengths, we scrutinize the role of the latter fordrawing the conclusion that the magnetic moment of the neutron is quantized. Wethen demonstrate that a marginal modification of the Newtonian model sufficesto construct, without invoking any concept of quantum theory, an event-basedsubquantum model that eliminates the shortcomings of the classical model andyields results that are in qualitative agreement with experiment and quantumtheory. In this event-by-event model, the intrinsic angular momentum can takeany value on the sphere, yet, for a sufficiently strong uniform magnetic field,the particle beam splits in two, exactly as in experiment and in concert withquantum theory.

Classical, quantum and event-by-event simulation of a Stern-Gerlach experiment with neutrons