3.3.2.27. NXxas_new

Status:

application definition, extends NXobject

Description:

This is an application definition for X-ray absorption spectroscopy.

Symbols:

The symbol(s) listed here will be used below to coordinate datasets with the same shape.

nEnergy: Number of energy data points

nTransitions: Number of electronic transitions

Groups cited:

NXcollection, NXcrystal, NXdata, NXdetector, NXedge, NXelement, NXentry, NXinstrument, NXmonochromator, NXprocess, NXsample, NXsource, NXuser, NXxas_mode

Structure:

ENTRY: (required) NXentry

definition: (required) NX_CHAR ⤆

Official NeXus NXDL schema to which this file conforms. TODO: replace NXxas ...

Official NeXus NXDL schema to which this file conforms. TODO: replace NXxas

Obligatory value: NXxas_new

calculated: (optional) NX_BOOLEAN {units=NX_UNITLESS}

Specify if the data commes from a calculation

energy: (required) NX_FLOAT (Rank: 1, Dimensions: [nEnergy]) {units=NX_ENERGY}

TODO

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

TODO

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

TODO

mode: (required) NXxas_mode

element: (required) NXelement

Excited element

edge: (required) NXedge

Absorption edge

SAMPLE: (required) NXsample ⤆

name: (required) NX_CHAR ⤆

Descriptive name of the sample

PROCESS: (optional) NXprocess ⤆

Description on how :ref:`energy ` ...

Description on how energy and intensity were obtained from the raw data.

INSTRUMENT: (optional) NXinstrument ⤆

SOURCE: (required) NXsource ⤆

type: (required) NX_CHAR ⤆

name: (required) NX_CHAR ⤆

probe: (required) NX_CHAR ⤆

Obligatory value: x-ray

monochromator: (optional) NXmonochromator ⤆

energy: (optional) NX_FLOAT (Rank: 1, Dimensions: [nEnergy]) {units=NX_ENERGY} ⤆

crystal: (optional) NXcrystal ⤆

d_spacing: (required) NX_FLOAT {units=NX_LENGTH} ⤆

spacing between crystal planes of the reflection

type: (required) NX_CHAR ⤆

Type or material of monochromating substance (Si, Ge, Multilayer).

reflection: (required) NX_INT (Rank: 1, Dimensions: [3]) {units=NX_UNITLESS} ⤆

Miller indices (hkl) values of nominal reflection

DETECTOR: (optional) NXdetector ⤆

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

i0: (optional) NXdetector ⤆

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

DATA: (optional) NXdata ⤆

XAS intensity versus energy plot

energy: link (suggested target: /NXentry/energy)

intensity: link (suggested target: /NXentry/intensity)

COLLECTION: (optional) NXcollection

DATA: (optional) NXdata

Table like data structure common in the XAS domain.

data: (required) NX_NUMBER (Rank: 2, Dimensions: [nChan, nEnergy])

columns: (required) NX_CHAR (Rank: 1, Dimensions: [nEnergy])

data_collector: (optional) NXuser

name: (required) NX_CHAR

orcid: (required) NX_CHAR

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/applications/NXxas_new.nxdl.xml