.. _Asec-predefinedmaterial:
.. _sec-appendix-predefinedmaterial:

Predefined materials
==================================================

This appendix lists the predefined materials that can be used with the
**@...@** notation described in :ref:`sec-predefined-material`.
The complete list is also provided as the index file
``predefined_material_index.csv`` in the ``data`` folder of the PHITS
package.

For each material, the table below shows its descriptive name, the
available alias names (any one of which can be written between **@** in
the **[material]** section), the state, the density in g/cm\ :sup:`3`,
the thermal neutron scattering data name
:math:`S(\alpha,\beta)`, the ``dedxfile`` of the stopping-power
data, and the elemental composition given as the (negative) partial
densities in g/cm\ :sup:`3`.
The :math:`S(\alpha,\beta)` and ``dedxfile`` columns are blank
when none is assigned; when present, the corresponding **MT** and
**dedxfile** lines are added automatically upon expansion (see
:ref:`sec-predefined-material`). The ``gas`` flag is omitted from the
composition column since it is indicated by the state column.
The material name written in ``[]`` and the ``name`` parameter of each
material are also registered as alias names; since spaces are not
allowed in alias names, spaces in these parameters are replaced with
``_``. Alias names are searched case-insensitively.

The predefined material data are based on the material list included in
Flair [#pdm_flair]_ , together with the three types of standard concrete
used in Japan and the United States [#pdm_concrete_jp]_ [#pdm_concrete_anl]_ .

.. csv-table:: List of predefined materials
   :file: predefined_material_list.csv
   :header: "Name", "Aliases", "State", "Density (g/cm³)", "S(α,β)", "dedxfile", "Composition (g/cm³)"
   :widths: 14, 26, 6, 9, 8, 12, 25
   :class: longtable

.. [#pdm_flair] https://flair.cern/
.. [#pdm_concrete_jp] Okuno et al., Japanese Concrete Composition Standard for Shielding Calculation, RADIOISOTOPES 75, S-01 (2026).
.. [#pdm_concrete_anl] Argonne National Laboratory, Reactor Physics Constants, 2nd ed., ANL-5800, July 1963.