Data Item _diffrn_radiation.pdbx_analyzer

General

Item name
_diffrn_radiation.pdbx_analyzer
Category name
diffrn_radiation
Attribute name
pdbx_analyzer
Required in PDB entries
no
Used in currrent PDB entries
No

Item Description

Indicates the method used to obtain monochromatic radiation. _diffrn_radiation.monochromator describes the primary beam monochromator (pre-specimen monochromation). _diffrn_radiation.pdbx_analyzer specifies the post-diffraction analyser (post-specimen) monochromation. Note that monochromators may have either 'parallel' or 'antiparallel' orientation. It is assumed that the geometry is parallel unless specified otherwise. In a parallel geometry, the position of the monochromator allows the incident beam and the final post-specimen and post-monochromator beam to be as close to parallel as possible. In a parallel geometry, the diffracting planes in the specimen and monochromator will be parallel when 2*theta(monochromator) is equal to 2*theta (specimen). For further discussion see R. Jenkins and R. Snyder, Introduction to X-ray Powder Diffraction, Wiley (1996), pp. 164-5.
 GE(111)
 Zr filter
 Ge 220
 none
 equatorial mounted graphite (0001)
 Si (111), antiparallel

Data Type

Data type code
text
Data type detail
text item types / multi-line text ...
Primitive data type code
char
Regular expression
[][ \n\t()_,.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*

Aliases

Alias Item Name Dictionary Name Dictionary Version
_pd_instr_monochr_post_spec cif_pd.dic 1.0