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W Wien Ann d Phys 30 369 1909
Louis Brown W Kent Ford Jr Vera Rubin Walter
Luther and Andrew Robeson Some Boron
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2p level accelerator angle aperture axicon Bashkin beam current BEAM-FOIL SPECTROSCOPY beryllium Bickel broadening capture carbon foil cascading charge collisions cross sections decay curve density detector determined distribution Doppler broadening Doppler effect Doppler spread effect electric field emission lines end-on configuration entrance slit excited atoms excited level experimental experiments exponential exposure Faraday cup Figure foil position foil thickness foil-excitation gas-excited Graaff Hanle-effect heavy ions helium hydrogen incident intensity ion beam ionization Klose Laboratory lens magnetic field mean lifetime mean lives Meinel Moak monochromator multiplets neutral nitrogen nsec observed obtained oxygen photocathode photoelectric photographic photomultiplier photons Phys plotted population pulse radiation radiative lifetimes ratio resonance Rice University shown in Fig shows side-on signal spectral line spectrograph spectrometer spectrum Table Tandem target chamber techniques transition probabilities tube University of Arizona velocity voltage wavelength width yield