Core dictionary (coreCIF) version 2.4.5
The method of determination of incident wavelength.
May appear in list containing _diffrn_radiation_wavelength_id
The data value must be one of the following:
|Wavelength that is a fundamental property of matter e.g. MoK\alpha.|
|Estimated from secondary information e.g. monochromator angle or time of flight.|
|Based on refinement using a standard material with known cell parameters.|