Rutherford (also Geiger-Marsden) Experiment (1911): Measured angular dependence of particles (He ions) scattered from gold foil. The results: • Mostly scattering at small angles. But • Occasional scatterings at large angles (even 90o) Something massive in there ! Conclusion: Most of atomic mass is concentrated in a small region of the atom Recall some history: | f EKICDAI DUVQICQ GENERAL rnTOiCo III Optics Quantum Physics Chapter XXII Atomic Structure 1. Hydrogen atom 2. Angular momentum of electron 3. Electron spin 4. Many-electron atoms At present it is well known for you that The Atom - electrons confined in Coulomb field of a nucleus Recall some history Rutherford also Geiger-Marsden Experiment 1911 Measured angular dependence of a a-particles He ions scattered from gold foil. The results Mostly scattering at small angles. But. Occasional scatterings at large angles even 90o Something massive in there Conclusion Most of atomic mass is a nucleus concentrated in a small region of the .
