3.3.1.76. NXedge

Status:

base class, extends NXobject

Description:

An absorption edge is a sharp discontinuity in the X-ray absorption spectrum ...

An absorption edge is a sharp discontinuity in the X-ray absorption spectrum of an element that occurs when the incident photon energy equals the binding energy of a core electron, enabling photoionization of that shell.

Symbols:

No symbol table

Groups cited:

none

Structure:

name: (optional) NX_CHAR

Name of the absorption edge specified using ...

Name of the absorption edge specified using IUPAC notation (e.g., K, L2, M5), which identifies the shell and sub-shell from which the electron is ejected.

Correspondence between IUPAC and electronic level notations:

IUPAC

Electronic level

K

1s

L1

2s

L2

\(2p_{1/2}\)

L3

\(2p_{3/2}\)

M1

3s

M2

\(3p_{1/2}\)

M3

\(3p_{3/2}\)

M4

\(3d_{3/2}\)

M5

\(3d_{5/2}\)

N1

4s

N2

\(4p_{1/2}\)

N3

\(4p_{3/2}\)

N4

\(4d_{3/2}\)

N5

\(4d_{5/2}\)

N6

\(4f_{5/2}\)

N7

\(4f_{7/2}\)

O1

5s

O2

\(5p_{1/2}\)

O3

\(5p_{3/2}\)

O4

\(5d_{3/2}\)

O5

\(5d_{5/2}\)

O6

\(5f_{5/2}\)

O7

\(5f_{7/2}\)

P1

6s

P2

\(6p_{1/2}\)

P3

\(6p_{3/2}\)

P4

\(6d_{3/2}\)

P5

\(6d_{5/2}\)

Any of these values:

  • K

  • L1

  • L2

  • L3

  • M1

  • M2

  • M3

  • M4

  • M5

  • N1

  • N2

  • N3

  • N4

  • N5

  • N6

  • N7

  • O1

  • O2

  • O3

  • O4

  • O5

  • O6

  • O7

  • P1

  • P2

  • P3

  • P4

  • P5

energy: (optional) NX_FLOAT {units=NX_ENERGY}

Energy of the absorption edge.

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/NXedge.nxdl.xml