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Absorption of the a Rays
Secondary Effects produced by a Rays
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absorbed absorption coefficient actinium active deposit aluminium amount angle apparatus artificial disintegration atomic number atomic weight average beam calculated cent Chadwick charge collisions compared corresponding Coulomb's law curve deduced deflection disintegration distance electron-volts electroscope elements emission emitted Energy in volts equilibrium experimental experiments foil frequency ft particles ft ray gases Geiger give given greater helium hydrogen intensity investigated ionisation ionisation chamber ions isotopes magnetic field mass maximum mean free path measured Meitner method mica nitrogen nuclear nucleus number of atoms number of electrons number of particles observed obtained particles from radium path Phil photographic Phys plate polonium Proc protactinium protons radiation radioactive radon range ray spectrum rays of radium recoil atoms relative Rutherford scintillations shown in Fig spectra stopping power theory thickness thorium tracks tube uranium variation velocity volts wave-length Zeit zinc sulphide