Spencer Klein Created 2026-10-18 Updated 2026-11-05
An experimental particle physicist who coauthors the Particle Data Group review of particle passage through matter with Donald E. Groom. It relates energy loss, multiple scattering and radiation processes to the signals and limitations of particle detectors. The same relations let an experimenter estimate whether a charged track will be detectable, stopped or significantly deflected.[ref]
Passage of Particles Through Matter by Donald E. Groom and Spencer Klein. Sections 34.2–34.4: stopping, multiple scattering and photon/electron interactions