A beam of slow neutrons can indeed be deflected by a strong magnetic field due to their magnetic moment, similar to the Stern-Gerlach experiment. However, the magnetic moment of neutrons is significantly smaller than that of atoms, which affects the degree of deflection. For a deeper understanding of this phenomenon, Chapter 1.1 of Sakurai's "Modern Quantum Mechanics" is recommended, as it discusses the Stern-Gerlach experiment in detail. Most quantum mechanics textbooks also cover this topic, particularly in their appendices. This deflection of slow neutrons by magnetic fields is a relevant topic in particle physics.