摘要: In this thesis, we discuss two new concepts in neutrino physics: The Mossbauer effect and non-standard interactions. We show that neutrinos emitted absorbed recoil-free processes (Mossbauer neutrinos) can oscillate spite of their near monochromaticity. support statement by quantum mechanical wave packet arguments a field theoretical (QFT) calculation the combined rate emission, propagation absorption. QFT approach does not require any priori assumptions on function, it allows us to include realistic treatment different mechanisms leading broadening emission absorption lines. second part work, study phenomenology interactions (NSI). classifying allowed NSI operators according impact future oscillation experiments present numerical results for sensitivities reactor, superbeam factory experiments. point out could mimic standard effects, might therefore lead incorrect fit values parameters. For case factory, perform detailed optimisation determine optimum muon energy detector configuration.