This website provides a java-script front end to the libdEdx stopping power library. It is inspired by the ESTAR, PSTAR, and ASTAR libraries maintained by NIST, but extends them with additional stopping power libraries and material compositions.
The purpose of libdEdx is to give easy access to tables and stopping power algorithms, but not to experimental data.
Currently the following stopping power tables are available:
Many of the tables above provide only stopping powers for a limited amount of target materials. The backend library libdEdx contains material composition data for more than 270 compounds, following the ICRU material index, if a material is selected which does not exist for a given table, then Braggs additivity rule is applied. Braggs addititvity rule will only work, if all constituents are available in the stopping power list, which may not be the case.
The Bethe equation is implemented as a function and is not based on tabulated data, and is in principle working for any material and ion.
The backend libdEdx was tested against the tabulated data, and deviations are below 0.1%. However libdEdx is still under development and naturally, bugs and inconsistencies may appear. We do not claim any correctness of the produced results, any use of these data are at own risk.
When using libdEdx, please refer to:
Lühr A, Toftegaard J, Kantemiris I, Hansen DC, Bassler N; Stopping power for particle therapy: The generic library libdEdx and clinically relevant stopping-power ratios for light ions. Int J Radiat Biol. 2011 Jul 19. [Epub ahead of print]. doi:10.3109/09553002.2011.595877.
You are free to use libdEdx for your own online services, but you should then clearly mention that libdEdx was developed by the Aarhus Particle Therapy Group, and explicitly link to http://dedx.au.dk, and ideally including our logo.