INTRODGTION TO INTENSITY INTERFEROMETRY FOR NUCLEAR - PARTICLE PHYSICISTS ' Alan Katz

The Hanbury-Brown and Twiss method for measuring the radii of stars also has interesting applications in other realms of physics. Intensity interferometry, the technique used by Hanbury-Brown and Twiss for their star measurements, should yield analogous information about the angular .-sizes of excited particles and nuclei, which emit secondary particles. In this report, we interpret such emissions and the correlation functions that arise from considering registration probabilities at two space or time points in terms of the language of optics and diffraction theory. Our objective is to review the physics involved in the Hanbury-Brown and Twiss effect and to point out possible applications to problems in nuclear and particle physics.