3.3.1.155. NXtrans

Status:

base class, extends NXobject

Description:

Transmission mode XAS. The absorption coefficient is given by ...

Transmission mode XAS. The absorption coefficient is given by the Beer-Lambert law:

\[\mu(E)t = -\ln(I/I_0)\]

where \(I\) is the intensity of the transmitted beam, \(I_0\) is the intensity of the incident beam, and \(t\) is the thickness of the sample.

Symbols:

nEnergy: Number of energy data points

Groups cited:

NXcrystal, NXdetector, NXmonochromator, NXprocess, NXsource

Structure:

SOURCE: (optional) NXsource

type: (optional) NX_CHAR

name: (optional) NX_CHAR

probe: (optional) 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: (optional) NX_FLOAT {units=NX_LENGTH}

The spacing between crystal planes of the reflection

type: (optional) NX_CHAR

Type or material of monochromating substance ...

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

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

Miller indices (hkl) values of nominal reflection

i0: (optional) NXdetector

Detector measuring the incident beam intensity ...

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

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

itrans: (optional) NXdetector

Detector measuring the transmitted beam intensity ...

Detector measuring the transmitted beam intensity \(I\).

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

PROCESS: (optional) NXprocess

Description of how the intensity was obtained from ...

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

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/base_classes/NXtrans.nxdl.xml