Abstract
The decay of ${}^{119}$Te to ${}^{119}$Sb via electron capture is utilized to produce isolated, single Frenkel pairs in InSb. This is caused by neutrino emission, which imparts a recoil of 12 eV to the ${}^{119}$Sb atoms, thereby displacing about 20% of them into interstitial sites. The effect is traced by M\"ossbauer emission spectroscopy following the decay of ${}^{119}$Sb to ${}^{119}$Sn. The displacement threshold ${E}_{d}$ is confined to $6<{E}_{d}<12$ eV from auxiliary experiments employing ${}^{119m}\mathrm{Te}$ isotopes.
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