The characterization of FeH molecules by mössbauer spectroscopy

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February 1984, Volume104(Issue4) Page398To400

Mössbauer emission spectroscopy performed with 57 Co implanted in solid hydrogen reveals a single quadrupole-split component assigned to an FeH molecule. This molecular bond is characterized by a temperature-independent quadrupole splitting Δ E Q of 2.4 (1) mm/s and an isomer shift with respect to α-Fe of 0.59(5) mm/s. The FeH is formed following dissociation of the H 2 molecule due to the highly energetic electron-capture, decay process. The molecule persists at least up to 70 K, long after evaporation of the H 2 matrix. These results are discussed in connection with previous attempts to observe the formation of FeH by conventional rare-gas-matrix isolation.

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    doi: 10.1016/0009-2614(84)80087-1