Data Item _diffrn_radiation.polarisn_ratio
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General 
- Item name
- _diffrn_radiation.polarisn_ratio
- Category name
- diffrn_radiation
- Attribute name
- polarisn_ratio
- Required in PDB entries
- no
- Used in currrent PDB entries
- No
Item Description
Polarisation ratio of the diffraction beam incident on the
crystal. It is the ratio of the perpendicularly polarised to the
parallel polarised component of the radiation. The perpendicular
component forms an angle of _diffrn_radiation.polarisn_norm to
the normal to the diffraction plane of the sample (i.e. the plane
containing the incident and reflected beams).
Data Type 
- Data type code
- float
- Data type detail
- int item types are the subset of numbers that are the floating numbers.
- Primitive data type code
- numb
- Regular expression
- -?(([0-9]+)[.]?|([0-9]*[.][0-9]+))([(][0-9]+[)])?([eE][+-]?[0-9]+)?
Allowed Boundary Conditions
| Minimum Value | Maximum Value |
|---|---|
| 0.0 | +∞ |
Aliases
| Alias Item Name | Dictionary Name | Dictionary Version |
|---|---|---|
| _diffrn_radiation_polarisn_ratio | cif_core.dic | 2.0.1 |