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Multiple-scattering effects on smooth neutron-scattering spectra

Wuttke1

  • 1Physik-Department E13, Technische Universitat Munchen, 85747 Garching, Germany.

Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
|December 2, 2000
PubMed
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Simulated neutron scattering experiments reveal that multiple scattering significantly distorts the wave-number-dependent amplitude in simple models. However, the frequency-dependent spectral distribution remains largely unaffected by this multiple scattering effect.

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Neutron Scattering

Background:

  • Neutron scattering is a powerful technique for probing atomic and molecular dynamics.
  • Understanding the effects of multiple scattering is crucial for accurate interpretation of scattering data.
  • Simple models are essential for isolating and understanding fundamental physical phenomena.

Purpose of the Study:

  • To simulate elastic and inelastic incoherent neutron-scattering experiments.
  • To investigate the impact of multiple scattering on scattering data for different material models.
  • To differentiate the effects of multiple scattering on the amplitude and spectral distribution of the scattering law.

Main Methods:

  • Simulation of neutron-scattering experiments.

Related Experiment Videos

  • Modeling of a rigid solid, a glass, and a viscous liquid.
  • Analysis of the scattering law, including its wave-number-dependent amplitude and frequency-dependent spectral distribution.

    • Main Results:

    • Multiple scattering severely distorts the wave-number-dependent amplitude of the scattering law.
    • The frequency-dependent spectral distribution is only weakly affected by multiple scattering.
    • These effects were observed across simulations of a rigid solid, glass, and viscous liquid.

    Conclusions:

    • Multiple scattering is a significant factor that must be accounted for when analyzing neutron-scattering data, particularly the wave-number-dependent amplitude.
    • The frequency-dependent spectral distribution is a more robust feature against multiple scattering effects.
    • These findings have implications for data analysis and model development in neutron scattering studies.