Last Update : 2013/06/05
2013/06/05: Upload of lecture notes for PHITS course in Paris
We upload the lecture notes used in the PHITS course.
You can download the lecture notes for 3 basic courses, 3 advanced courses,
and 1 exercise course. These packages including sample input files are also uploaded.
Please download in this page.
These files are very useful for starting up with PHITS!
2013/03/05: Registration of PHITS2.52 in OCED/NEA databank
A new version of PHITS, version 2.52, has been registered
in OECD/NEA databank. (PHITS page in the databank)
The version registered in RSICC is still the old version (PHITS2.24),
but hopefully, it will be updated soon.
The new version is greatly improved in terms of many aspects,
including its package contents such as nuclear data libraries.
Please see update log in more detail.
We cannot send the patch file to upgrade PHITS2.24 (or 2.30)
to PHITS2.52 because the upgrade contents are so numerous.
So, please ask OECD/NEA databank for the update of the code.
2013/01/18: Announcement of PHITS course in Paris
We are glad to announce that 4-days PHITS course will be held on
Jun 10 (Mon) - 13 (Thu), 2013 at NEA Issy-les-Moulineaux, Paris, France.
This event is organized with the support OECD NEA.
The course fee is 500 euro. It includes the cost of official dinner.
The course consists of
1. General introduction of PHITS
2. Installation of the latest version of PHITS in your laptop PC (Windows
3. Basic lecture (how to setup geometry, source, tally and parameters)
4. Advanced lecture (useful functions, variance reduction, voxel phantom)
The tutors will be Tatsuhiko Sato of JAEA, Lember Sihver of Chalmers
University of Technology, and more (depends on the number of participants)
You can register this PHITS course from OECD/NEA training courses page.
No particular experience with PHITS or other Monte Carlo codes is required,
but you have to become a registered PHITS user in prior to the course.
(see How to Get in detail)
More information will be uploaded in future.
We are very much looking forward to seeing you in Paris!
2012/08/14: Update 'What is PHITS' and 'Sample' pages
'What is PHITS' and 'Sample' pages are updated.
In the 'Sample' page, we uploaded the instructions for how to use
utilities for creating GIF animation from PHITS output files
Example of GIF animation created by utilities given in 'Sample' page
2012/08/6: Update FAQ and upload PHITS introduction
We updated FAQ and uploaded PHITS introduction file
2012/07/19: Bug in source
We found a bug in the generation of isotropic source for
event-by-event calculation (s-type = 9(or 10), dir = iso)
If you would like to use this source, please send us an e-mail, phits-officejaea.go.jp.
We will send corrected source file to you.
We also found a bug in electron and positron
transport algorithm over 10 MeV, when you set their
cut-off energies below 1 MeV. Therefore, please
set emin(12) and emin(13) > 1 MeV, if you would like
to transport high-energy electrons and positrons in PHITS.
We will fix this bug in the next version.
2012/06/20: Survey of PHITS tutorial in English
The PHITS developing team is planning to have a PHITS tutorial
in English at the end of this year or early next year.
The tutorial includes
1. Installation of PHITS (Windows or Mac) (0.5h)
2. General introduction of PHITS (1h)
3. Basic lecture I (Geometry & Source) (4h)
4. Basic lecture II (Tally) (3h)
5. Basic lecture III (Parameter setting) (3h)
6. Advanced lecture I (Voxel phantom) (3h)
7. Advanced lecture II (Event generator mode) (3h)
8. Advanced lecture III (Other functions) (3h)
9. Free discussion and Q&A
It will be 3 days course, and tutorial fee will be
around 400 euro (depends on the number of students).
You can also participate only in the half of the tutorial
(Basic or Advanced lecture) with approximately half price.
For determining the detailed schedule of the tutorial,
please let us know your preferable time and location,
if you are interested in that.
Please also distribute this announcement to your colleagues
and friends who is a potential user of the PHITS code.
1. November or December 2012 (except for Chrismas vacation!)
2. January or Febrauary 2013
3. March or April 2013
4. May or June 2013 (around NEUDOS-12)
5. Others (let us know details)
6. Everytime is OK!
1. Gothenberg, Sweden
2. Paris, France
3. Others (let us know details, requests from Asia and America are also
4. Everywhere is OK!
We are looking forward to seeing you in Europe!
2012/06/13: Upload of lecture notes used in PHITS tutorial
We upload the lecture notes used in PHITS tutorial.
You can download the lecture notes for 3 basic courses including their
sample input files
You can also download the ppt files for each basic courses as well as
those for advanced courses for making voxel phantom in the manual page.
These files are very useful for starting up with PHITS!
2012/04/25: Announcement of PHITS tutorial in Sweden
We are glad to announce that one-day PHITS tutorial will be held on
June 9th (Sat) as a part of Microdosimetry course organized by
Karolinska Institute in Stockholm, Sweden. The PHITS tutorial is
opened for every PHITS user, regardless the registration of
microdosimetry course. It covers the general introduction of the
PHITS code, installation of the latest version of PHITS in your laptop
computer, and instruction how to use it. The tutor is Tatsuhiko Sato
Recently, we developed a Windows and Mac installer of PHITS. So if
you feel difficulty how to install or how to use PHITS, this must be
the best chance to start up with PHITS!
If you are interested in this tutorial, please email us "phits-officejaea.go.jp".
2011/10/5: Release of Recommendation Settings
It is difficult to select appropriate parameters in the PHITS input file,
since the default settings does not always give the best results for some
cases (see FAQ in more details).
For easier start up of PHITS, we provide 7 examples of PHITS input and
Please download the following zip file, and find the appropriate setting
suit for your calculation.
The return codes in those files are "CR+LF",
so please convert them to "LF" when you use those files in Linux
2011/9/6: Release of PHITS 2.30L
We are glad to announce that
a new version of PHITS, version 2.30, has just been released.
The updates mainly concern the following:
1. Improvement of the DPA calculations including the Coulomb scattering.
2. Incorporation of the function to generate delta-rays
3. Release of the photon-atomic data library
4. Revision of the manual
We will soon send the patch files for updating the previous released version, 2.24,
to the latest one for both sources and Windows binary via PHITS mailing lists.
If you have not registered the mailing lists, and would like to update PHITS,
please read the instruction below, and email to us with your information.
2011/2/25: new PHITS mailing list
For providing future update information, we are planning to
establish completely new PHITS mailing lists.
If you would like to continue to recieve the PHITS information,
please select one of the following four items, and
email to us (phits-officejaea.go.jp) with your information
1. Information only.
2. Information + Patch file for updated executable file of PHITS (for
3. Information + DIFF file for updated source files of PHITS (for Linux
4. All of above.
Items 2, 3 and 4 are limited only to the official users
who obtained PHITS from OECD/NEA data bank.
This is the final email that was sent using the current PHITS mailing
and we look forward to hearing from you in the near future.
2011/2/3: Release of PHITS 2.24
A new version of PHITS (2.24L) including the JENDL-4 neutron data library
has been registered in OECD/NEA data bank.
OECD/NEA Data Bank page
Please obtain the new version of PHITS from the data bank, even if you have already registered as a PHITS beta-user. Many new features such as the event generator mode and the microdosimetric
function were incorporated in the new version. Several bugs were fixed.
2011/2/3: GUI-software SimpleGEO can be used for making PHITS geometries
SimpleGEO is an interactive solid modeler which allows for flexible and easy creation of the models via drag & drap, as well as on-the-fly inspection. The software was developed in CERN, and can be downloaded from its web site (Registration is requested). Courtesy of its developer, Dr. Thesis, it
was recently upgraded to be capable of generating geometries written in
PHITS readable format: GG geometry using macro bodies. It can also visualize
the results of xyz-mesh tallies (The extension of the tally output file
should be *.out).
If you are not familiar with GG or CG format, SimpleGEO helps you a lot
in making PHITS geometries.
Examples of geometries drawn by SimpleGEO together with xyz-mesh tally
outputs by PHITS
2011/2/3: Information on parameter setting for large parallel execution
If you would like to execute PHITS in a parallel computer using more than
200 CPU, you have to change "iccp" parameter in source files.
The detailed information is as follows:
line 23 : common /mpi01/ iccp(200)
line 1465 : common /mpi01/ iccp(200)
line 6991 : common /mpi01/ iccp(200)
line 53 : common /mpi01/ iccp(200)
line 87 : data iccp /200*0/
line 340 : common /mpi01/ iccp(200)
line 623 : common /mpi01/ iccp(200)
Please change from (200) to (20000), and recompile PHITS.