Installer SRIM en renommant les deux fichiers en .exe.
On utilisera indifféremment la version 2013 ou 2008 qui fonctionnent bien sous windows 10. Run the SRIM.EXE file.
CLIK on TRIM calculation
Then on TRIM DEMO.
Then load the case Death ray !
This case is very convenient as it load automatically the Air as a medium. We will modify only the three red circles and the total numbers of ions in bottom left :
43 km => 4 cm
H => He (click on PT Periodic Table to choose an alpha particle).
1E+07 => 5E+03 keV (5 MeV for the alpha particle)/
Total number of ions : put 100
We obtain :
Click on the green box « Save input and Run TRIM »
What is important is the longitudinal range at right : 34,9 mm in air for an alpha particle of 5 MeV. You can also display the distribution of the number of ion if you tick the curve in the plot section.
A very nice and pleasant program !