Abstract
The in-beam Mossbauer spectrum of 57Mn implanted into a Xe solid at 14 K was measured. Four singlets were observed in the spectrum, assigned to 57Fe + (3d7), 57Fe + (3d64s1), 57Fe0 (3d64s2), and 57Fe0 (3d74s1). The assignments were in agreement with calculated electron densities at nuclei reported in the literature. The β-decay of 57Mn did not disturb the surrounding Xe lattice, showing a singlet peak, and the excited states were stabilized in the time range of the Mossbauer measurements of ~100 ns. The production mechanism was explained in terms of the reduction of 57Mnx + and 57Fey + ions by free electrons in the Xe matrix.
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