Muonic X rays and capture γ rays in 89Y

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Abstract
The main mu-atomic transition energies in 89Y were measured with a high-resolution Ge(Li) spectrometer. The nuclear charge parameters of yttrium were derived by fitting the observed transition energies to those obtained by numerically solving the Dirac equation, using a radially symmetric Fermi charge distribution. The line intensities were also measured and shown to agree reasonably well with the results of a cascade calculation. Finally, we measured the energies and intensities of the most prominent capture γ rays. Most of these γ rays could be assigned to known transitions in the strontium isotopes 86 through 89.

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