Abstract:A crossed beam technique has been developed for measuring the emission cross section for the excitation of electric dipole transitions in ions by electron impact. The experimental method involves crossing modulated ion and electron beams in a well-defined collision volume. A portion of the photon flux radiated from the excited ions is detected at an angle of 90° to the plane of the two beams by direct observation of the collision volume with a photomultiplier tube. The selection of a single emission line is ac… Show more
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