High-resolution measurement of Fe Kα x rays produced by MeV/amu iodine ions

J. A. Tanis, B. Budick, J. W. Kast, A. M. Rushton

    Research output: Contribution to journalArticlepeer-review


    Using a high-resolution Bragg spectrometer equipped with a LiF crystal, the authors have measured the Kα x rays of Fe produced by incident I127 projectiles of energy 100 and 167 MeV. Distinct satellite structure corresponding to K x-ray emission in the presence of multiple L vacancies was resolved. The observed spectra consisted of six major components, from which it is concluded that initial L1 vacancies transfer before x-ray emission via fast 2s→2p Coster-Kronig transitions. The authors have determined the energy, width, and intensity of the individual satellite peaks, and find that the number of M vacancies increases with L vacancies and that the degree of M-shell ionization is greater at the lower beam energy. Relative ionization intensities were determined by taking into account the effects of L-shell rearrangement prior to K-x-ray emission. It is found that these intensities are reasonably well represented by a binomial distribution giving ionization probabilities pL of 0.41 and 0.44 at 100 and 167 MeV, respectively.

    Original languageEnglish (US)
    Pages (from-to)2440-2448
    Number of pages9
    JournalPhysical Review A
    Issue number6
    StatePublished - 1979

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics


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