The Mössbauer Effect at Impurity Nuclei

Site Selective and Single Complex Laser-Based Spectroscopies: A Window on Excited State Electronic Structure, Excitation Energy Transfer, and Electron–Phonon Coupling of Selected Photosynthetic Complexes

“…The main properties of narrow ZPLs in the spectra of crystal impurities were first discussed in detail by Kane . Shortly thereafter, the principal analogy between the ZPL in the optical spectrum of an impurity center and the Mössbauer line in the spectrum of γ-quanta, absorbed or emitted by a radioactive nucleus in a crystal lattice, had been demonstrated. , A comprehensive theory of impurity spectra in solids can be found, for example, in an excellent book written by Rebane . A zero-phonon transition is one for which no net change in the number of phonons accompanies the electronic transition.…”

Selective laser spectroscopy of molecules and ions in solids: a history, fundamentals and applications

“…By using a simple model, he calculated the strength of electron-phonon interaction for impurity silicon and germanium crystals and showed that narrow lines in experimental spectra of these crystals are zerophonon lines. In 1961, Dzyub and Lubchenko [28] obtained a similar result. They calculated the shape of homogeneous optical spectra of impurity centers in a crystal and showed that in the general case the absorption (emission) spectrum of an impurity center consists of a narrow resonance ZPL and a broad phonon sideband (PSB) shifted to the blue (red) from the ZPL.…”

“…Methods of frequency-selective spectroscopy of solids: selective excitation of luminescence of ions and molecules in amorphous and crystalline matrices [1,7] and persistent hole burning in absorption spectra [10,11] are the most efficient high-resolution methods of optical studies of solids with the maximal possible spectral resolution limited only by the natural width of the optical zero-phonon line. The limiting high spectral resolution is achieved due to removing the inhomogeneous broadening of optical spectra upon resonance monochromatic excitation of impurity centers via very narrow homogeneous zero-phonon lines [26][27][28] masked by the large inhomogeneous broadening of the optical spectrum observed upon usual nonselective excitation.…”