anomalous dispersion การใช้

• The processes used to decide the absolute structure use the anomalous dispersion effect.
• This was just inside the anomalous dispersion regime for their fibre.
• Light atoms usually show only a small anomalous dispersion effect.
• Other methods of experimental phase determination include " Single-wavelength Anomalous Dispersion " ( SAD ).
• In the infrared, the equation becomes inaccurate, and it cannot represent regions of anomalous dispersion.
• This is called " anomalous dispersion ".
• In 1949 Bijvoet outlined his principle, which relies on the anomalous dispersion of X-ray phase being altered.
• In regions of anomalous dispersion, the opposite is true, and the pulse is compressed temporally and becomes shorter.
• The zero dispersion wavelength of the fibre was at 1.30 ?m, placing the pump just inside the anomalous dispersion regime.
• This condition describes the requirement for anomalous dispersion ( such that \ gamma \ beta _ 2 is negative ).
• The result was " a direct consequence of classical interference of different frequency components of an anomalous dispersion region ."
• Anomalous dispersion occurs, for instance, where the wavelength of the light is close to an absorption resonance of the medium.
• However, atomic scattering factors have imaginary parts due to the anomalous dispersion effect, and Friedel's law is broken by this effect.
• This is called " normal dispersion ", in contrast to " anomalous dispersion ", where the refractive index increases with wavelength.
• In X-ray crystallography, incorporation of one or more selenium atoms in place of sulfur helps with multiple-wavelength anomalous dispersion and single wavelength anomalous dispersion phasing.
• In X-ray crystallography, incorporation of one or more selenium atoms in place of sulfur helps with multiple-wavelength anomalous dispersion and single wavelength anomalous dispersion phasing.
• The principal technical advances were in taking absorption spectra in polarized light and measuring dispersion, including the anomalous dispersion near the absorption lines, at low temperatures.
• Whereas, if the index increases with increasing wavelength ( which is typically the case for X-rays ), the medium is said to have " anomalous dispersion ".
• If the pulse is of sufficient intensity, the spectral broadening process of SPM can balance with the temporal compression due to anomalous dispersion and reach an equilibrium state.
• In 1951 Johannes Martin Bijvoet for the first time used in X-ray crystallography the effect of anomalous dispersion, which is now referred to as resonant scattering, to determine absolute configuration.