.. auto-generated by dev_tools.docs.nxdl from the NXDL source contributed_definitions/NXinteraction_vol_em.nxdl.xml -- DO NOT EDIT

.. index::
    ! NXinteraction_vol_em (base class)
    ! interaction_vol_em (base class)
    see: interaction_vol_em (base class); NXinteraction_vol_em

.. _NXinteraction_vol_em:

====================
NXinteraction_vol_em
====================

..
    Contributors List

    .. |contrib_name| replace:: Kuehbachm|mkuehbach|https://avatars.githubusercontent.com/u/14091504?v=4|2022-06-21

**Status**:

  base class, extends :ref:`NXobject`

**Description**:

  .. collapse:: Base class for storing details about a modelled shape of interaction volume. ...

      Base class for storing details about a modelled shape of interaction volume.

      The interaction volume is mainly relevant in scanning electron microscopy
      when the sample is thick enough so that the beam is unable to illuminate
      through the specimen.
      Computer models like Monte Carlo or molecular dynamics / electron beam
      interaction simulations can be used to qualify and/or quantify the shape of
      the interaction volume.

      Explicit or implicit descriptions are possible.

      * An implicit description is via a set of electron/specimen interactions  
        represented ideally as trajectory data from the computer simulation.  
      * An explicit description is via an iso-contour surface using either  
        a simulation grid or a triangulated surface mesh of the approximated  
        iso-contour surface evaluated at specific threshold values.  
        Iso-contours could be computed from electron or particle fluxes through  
        an imaginary control surface (the iso-surface).  
        Threshold values can be defined by particles passing through a unit control  
        volume (electrons) or energy-levels (e.g. the case of X-rays).  
        Details depend on the model.  
      * Another explicit description is via theoretical models which may  
        be relevant e.g. for X-ray spectroscopy

      Further details on how the interaction volume can be quantified
      is available in the literature for example:

      * `S. Richter et al. <https://doi.org/10.1088/1757-899X/109/1/012014>`_  
      * `J. Bünger et al. <https://doi.org/10.1017/S1431927622000083>`_

**Symbols**:

  No symbol table

**Groups cited**:
  :ref:`NXdata`, :ref:`NXprocess`

.. index:: NXdata (base class); used in base class, NXprocess (base class); used in base class

**Structure**:

  .. _/NXinteraction_vol_em/DATA-group:

  **DATA**: (optional) :ref:`NXdata` 


  .. _/NXinteraction_vol_em/PROCESS-group:

  **PROCESS**: (optional) :ref:`NXprocess` 



Hypertext Anchors
-----------------

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


* :ref:`/NXinteraction_vol_em/DATA-group </NXinteraction_vol_em/DATA-group>`
* :ref:`/NXinteraction_vol_em/PROCESS-group </NXinteraction_vol_em/PROCESS-group>`

**NXDL Source**:
  https://github.com/nexusformat/definitions/blob/main/contributed_definitions/NXinteraction_vol_em.nxdl.xml