Do you know the meaning of the Zero phonon or phonon-assisted?

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SUMMARY

The discussion focuses on the concepts of Zero phonon and phonon-assisted processes, particularly in the context of the Mössbauer effect. Zero phonon refers to the emission and absorption of photons without lattice excitation, providing insights into hyperfine interactions. Phonon-assisted processes involve side bands that arise from the Mössbauer effect, revealing information about the phonon density of states. Key techniques for obtaining this information include nuclear inelastic scattering (NIS) and nuclear resonant inelastic X-ray scattering (NRIXS).

PREREQUISITES
  • Understanding of the Mössbauer effect and its historical context.
  • Familiarity with nuclear inelastic scattering (NIS) techniques.
  • Knowledge of phonon density of states in solid-state physics.
  • Basic principles of quantum mechanics related to lattice excitations.
NEXT STEPS
  • Research the principles of nuclear resonant inelastic X-ray scattering (NRIXS).
  • Study the historical development and applications of the Mössbauer effect.
  • Explore quantum mechanics textbooks that cover phonon-assisted processes.
  • Investigate the role of synchrotron sources in nuclear inelastic scattering experiments.
USEFUL FOR

Physicists, materials scientists, and researchers in condensed matter physics who are interested in the interactions of photons with lattice structures and the implications of phonon-assisted phenomena.

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Do you know the meaning of the Zero phonon or phonon-assisted?
 
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phonon-assisted ... what?

phohon-assisted scattering, tunneling, ..?

also what is the context of zero phonon?
 


Zero phonon: during emission and absorption there is no lattice excitation (Mössbauer effect)-here information on the hyperfine interactions (or n=0 so E=hv/2).
Phonon assisted:together with zero phonon, there will be side bands. These side bands are assisted by Mössbauer effect. Here you get information on phonon density of states..
these informations can be obtained from nuclear inelastic scattering-NIS (a.k.a. nuclear inelastic absorption, nuclear resonance vibrational spectroscopy-NRVS, phonon assisted Mössbauer effect, Nuclear resonant inelastic X-ray scattering-NRIXS).
Just try for find some quantum book, or a Mössbauer book..you will get all info there.
PS: Mössbauer effect discovered in 1957, Theorists predicted that there will be phonon assisted Mössbauer effect (side bands) in 1960, after first experiments in 1985, first NIS side band spectrum published in 1995 (help of synchrotron sources).
 
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