3.3.3.107. NXxas_tfy

Status:

application definition (contribution), extends NXxas

Description:

In total fluorescence yield (TFY), the absorption coefficient ...

In total fluorescence yield (TFY), the absorption coefficient \(\mu(E)\) is proportional to the ratio of the total fluorescence intensity \(I_f\) and the incident beam intensity \(I_0\):

\[\mu(E) \propto I_f/I_0\]

The total fluorescence signal is measured with a detector such as a photodiode that collects all emitted fluorescence without energy discrimination.

The top-level intensity field contains the processed absorption coefficient. When the raw detector data and processing steps are available, they can be stored in the optional NXinstrument and NXprocess groups, enabling full reproducibility of the data reduction.

Symbols:

No symbol table

Groups cited:

NXdetector, NXentry, NXinstrument, NXprocess

Structure:

ENTRY: (required) NXentry ⤆

definition: (required) NX_CHAR ⤆

Official NeXus NXDL schema to which this file conforms. ...

Official NeXus NXDL schema to which this file conforms.

Obligatory value: NXxas_tfy

intensity: (required) NX_FLOAT (Rank: 1, Dimensions: [nEnergy]) {units=NX_ANY} ⤆

The absorption coefficient \(\mu(E) \propto I_f/I_0\).

INSTRUMENT: (optional) NXinstrument ⤆

i0: (required) NXdetector ⤆

Detector measuring the incident beam intensity ...

Detector measuring the incident beam intensity \(I_0\).

data: (required) NX_NUMBER (Rank: 1, Dimensions: [nEnergy]) ⤆

if: (required) NXdetector ⤆

Detector measuring the total fluorescence emission ...

Detector measuring the total fluorescence emission \(I_f\).

data: (required) NX_NUMBER (Rank: 1, Dimensions: [nEnergy]) ⤆

PROCESS: (optional) NXprocess ⤆

Description of how :ref:`intensity ...

Description of how intensity was obtained from the raw detector data (i0, if).

program: (optional) NX_CHAR ⤆

Name of the program used for processing.

version: (optional) NX_CHAR ⤆

Version of the program used for processing.

date: (optional) NX_DATE_TIME ⤆

Date and time of processing.

Hypertext Anchors

List of hypertext anchors for all groups, fields, attributes, and links defined in this class.

NXDL Source:

https://github.com/nexusformat/definitions/blob/main/contributed_definitions/NXxas_tfy.nxdl.xml