Task: Text Categorization
Input (English): One aspect of this property was confirmed in an experiment that fired silver atoms through an inhomogeneous magnetic field. That experiment, performed by Stern and Gerlach, showed that this property was quantized. Fine structure refers to splitting spectral lines due to coupling between it and an electron's orbital angular momentum. Pauli names a set of matrices associated with it, and was the first to propose it as a quantum number. For 10 points, name this property that is an integer for bosons and half integer for fermions, a particle's intrinsic angular momentum.
Output (English): Science