  We propose a simple model which describes the statistical properties of
quantum jumps in a single-spin measurement using the oscillating
cantilever-driven adiabatic reversals technique in magnetic resonance force
microscopy. Our computer simulations based on this model predict the average
time interval between two consecutive quantum jumps and the correlation time to
be proportional to the characteristic time of the magnetic noise and inversely
proportional to the square of the magnetic noise amplitude.
