.. _[t-interact]:

[ T-Interact ] section (formerly named [ T-Star ])
==================================================

This tally gives the number of interactions occurring in the specified regions.
It was formerly named **[t-star]** because it can calculate the star density, but we changed the name from version 3.04 in order to explicitly state that it is the tally for counting the number of interactions.
Note that the former name, **[t-star]**, is still accepted even after version 3.04.
To calculate the number of atomic interactions using this tally, use the EGS5 mode, **negs=1,2**.
To calculate the number of nuclear interactions using nuclear data library, use the Event Generator mode, **e-mode>=1**.

.. rst-class:: no-caption-number

.. list-table:: **mesh**
   :header-rows: 0

   * - value
     - explanation
   * - **reg, r-z, xyz**
     - Mesh type.
       A mesh type subsection is required below this option.

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.. list-table:: **MorP**
   :header-rows: 0

   * - value
     - explanation
   * -  | **mean, prob** (omissible)
     -  | Output the mean number (**mean**) or probability density (**prob**) of interactions. Only when **mesh=reg**, select **prob**.

.. include:: ./commontally/part.rst
.. include:: ./commontally/material.rst
.. rst-class:: no-caption-number

.. list-table:: **mother**
   :header-rows: 0

   * - value
     - explanation
   * - (optional)
     - Specify mother nuclei.
   * - **all**
     - **all** is the default, same as no definition.
   * - number of mother nuclei
     - When setting the number of mother nuclei, define the mothers in the next line.
       The number of **mother** can be set as a negative value, in which case the specified mothers are not included for scoring.
       When **output=atomic**, **mother** cannot be specified.
   * - (next line)
     - **208Pb Pb**
       Nucleus if specified using mass.
       Without mass, all nuclei are isotopes of Pb.
       To specify multiple mother groups, use multiple **[t-interact]** tallies.

.. include:: ./commontally/e-type.rst
.. include:: ./commontally/t-type.rst
.. rst-class:: no-caption-number

.. list-table:: **unit**
   :header-rows: 0

   * - value
     - explanation
   * - **1, 2**
     - **1**: [1/cm^3/source]
       **2**: [1/cm^3/MeV/source]
   * - **11, 12**
     - **11**: [1/cm^3/nsec/source]
       **12**: [1/cm^3/nsec/MeV/source]

.. rst-class:: no-caption-number

.. list-table:: **axis**
   :header-rows: 0

   * - value
     - explanation
   * - **eng, reg, x, y, z, r**
     - x axis value of output data.
   * - **xy, yz, xz, rz**
     - 2-dimensional.
   * - **t**
     - Time axis.
   * - **act**
     - Number of interaction, for **MorP=prob**.

.. rst-class:: no-caption-number

.. list-table:: **maxact**
   :header-rows: 0

   * - value
     - explanation
   * - (optional, D=100)
     - Maximum number of interactions per history for **axis=act**.
       If the number of interactions exceeds this value, the history is counted as 'overflow,' whose probability is output just above the 'sum over' line.

.. include:: ./commontally/samepage.rst
.. include:: ./commontally/file.rst
.. include:: ./commontally/resfile.rst
.. include:: ./commontally/factor.rst
.. include:: ./commontally/title.rst
.. include:: ./commontally/angel.rst
.. include:: ./commontally/sangel.rst
.. include:: ./commontally/2d-type.rst
.. include:: ./commontally/x-txt.rst
.. include:: ./commontally/y-txt.rst
.. include:: ./commontally/z-txt.rst
.. rst-class:: no-caption-number

.. list-table:: **output**
   :header-rows: 0

   * - value
     - explanation
   * - 
     - Reaction type.
       Only one can be set.
   * - **all**
     - All reactions.
   * - **decay**
     - Decay reaction.
   * - **elastic**
     - Elastic scattering.
   * - **nuclear**
     - Nuclear reaction excluding elastic scattering.
       This corresponds to **nonela** in **[t-product]**.
   * - **fission**
     - Fission.
   * - **absorption**
     - Absorption.
   * - **heavyion**
     - Heavy ion reaction.
   * - **transmut**
     - Reactions inducing transmutation of target nuclei.
   * - **atomic**
     - Atomic interaction excluding multiple scattering.
   * - **deltaray**
     - Delta-ray production.
   * - **knockelec**
     - Production of knock-on electrons by electrons and positrons.
   * - **atmflu**
     - Atomic fluorescence x-ray emission.
   * - **auger**
     - Auger electron emission.
   * - **brems**
     - Bremsstrahlung.
   * - **photoelec**
     - Photoelectric effect.
   * - **compton**
     - Compton scattering.
   * - **pairprod**
     - Electron-positron pair production.
   * - **annih**
     - Positron annihilation.
   * - **ts_hit**
     - All events in track-structure mode.
   * - **ts_ioniz**
     - Ionization in track-structure mode.
   * - **ts_bio**
     - Sum of the events that can cause DNA damage, ionization, electronic-excitation, electron capture, and dissociative electron attachment, in track-structure mode.
   * - **ts_w**
     - Sum of the events that generate electrons, ionization and electron stripping, in track-structure mode.
       The w-value can be deduced from the quotient of deposition energy and this value.
   * - **ets_elas**
     - Elastic scattering in PHITS-etsmode [#etsmode]_.
   * - **ets_ioniz**
     - Ionization in PHITS-etsmode.
   * - **ets_e-exc**
     - Electronic excitation in PHITS-etsmode.
   * - **ets_dea**
     - Dissociative electron attachment in PHITS-etsmode.
   * - **ets_v-exc**
     - Vibration excitation in PHITS-etsmode.
   * - **ets_p-exc**
     - Photon excitation in PHITS-etsmode.
   * - **ets_r-exc**
     - Rotation excitation in PHITS-etsmode.
   * - **ets_plasmon**
     - Plasmon excitation in PHITS-etsmode.
   * - **ets_ioniz_e-exc**
     - Sum of the ionization and electronic excitation in track-structure mode.
   * - **ets_hit**
     - All reactions in PHITS-etsmode.
   * - **kurbuc_elas**
     - Elastic scattering in PHITS-KURBUC [#kurbuc]_.
   * - **kurbuc_ioniz**
     - Ionization in PHITS-KURBUC.
   * - **kurbuc_e-exc**
     - Electronic excitation in PHITS-KURBUC.
   * - **kurbuc_e-cap**
     - Electron capture in PHITS-KURBUC.
   * - **kurbuc_ioniz_e-exc_e-cap**
     - Ionization, electronic excitation, and electron capture in PHITS-KURBUC.
   * - **kurbuc_e-stp**
     - Electron stripping in PHITS-KURBUC.
   * - **kurbuc_hit**
     - All reactions in PHITS-KURBUC.
   * - **its_elas**
     - Elastic scattering in ITSART [#itsart]_.
   * - **its_ioniz**
     - Ionization in ITSART.
   * - **its_e-exc**
     - Electronic excitation in ITSART.
   * - **its_ioniz_e-exc**
     - Ionization and electronic excitation in ITSART.
   * - **its_hit**
     - All reactions in ITSART.

.. [#etsmode] PHITS-etsmode is track-structure mode in PHITS.
.. [#kurbuc] PHITS-KURBUC is proton and carbon track-structure mode in PHITS.
.. [#itsart] ITSART is generalized track-structure mode in PHITS.

.. include:: ./commontally/gshow.rst
.. rst-class:: no-caption-number

.. list-table:: **rshow**
   :header-rows: 0

   * - value
     - explanation
   * - **0** (default), **1, 2, 3**
     - When **mesh=xyz** and **axis=xy,yz,xz**, region border (1), material name (2), and region name (3) are plotted using this option.
       A **xyz** mesh section must be added below this option.

.. include:: ./commontally/volume.rst
.. include:: ./commontally/iechrl.rst
.. include:: ./commontally/resol.rst
.. include:: ./commontally/width.rst
.. include:: ./commontally/volmat.rst
.. include:: ./commontally/epsout.rst
.. include:: ./commontally/bmpout.rst
.. include:: ./commontally/vtkout.rst
.. include:: ./commontally/vtkfmt.rst
.. include:: ./commontally/maxangel.rst
.. include:: ./commontally/ctmin.rst
.. include:: ./commontally/ctmax.rst
.. include:: ./commontally/chmin.rst
.. include:: ./commontally/chmax.rst
.. include:: ./commontally/trcl.rst
.. include:: ./commontally/gslat.rst
.. include:: ./commontally/stdcut.rst
.. rst-class:: no-caption-number

.. list-table:: **nlatcel**
   :header-rows: 0

   * - value
     - explanation
   * - (optional)
     - By setting the cell number which has the LAT parameter, the number of interactions in cells that have the same cell number but are placed in different lattice coordinates are processed as different cells.
       It works only for **MorP=prob**.

.. rst-class:: no-caption-number

.. list-table:: **nlatmem**
   :header-rows: 0

   * - value
     - explanation
   * - (optional, D=1000)
     - The maximum number of cells dealt with separately in one history.


When **coll** or reaction events belonging to **coll** are specified in **[counter]**, the counter value changes before the particle information is tallied.
Therefore, to tally the information at the moment the reaction event occurs, specify the counter value after the change.