Gabriele Cosmo*** microyz example *** Author: S. Incerti et al. Date: 1 June 2017 Email: incerti@cenbg.in2p3.fr (c) The Geant4-DNA collaboration. This examples shows how to compute microdosimetry distributions y, z in liquid water using exclusively Geant4-DNA physics processes and models. This example is provided by the Geant4-DNA collaboration. These processes and models are further described at: http://geant4-dna.org Any report or published results obtained using the Geant4-DNA software shall cite the following Geant4-DNA collaboration publications: Phys. Med. 31 (2015) 861-874 Med. Phys. 37 (2010) 4692-4708 J. Appl. Phys. 122 (2017) 024303 1) Geometry A box of liquid water. 2) Incident particles Particles can be selected from the mycroyz.in macro as well as their incident energy. They are shot from the center of the box. 3) Physics The default Geant4-DNA physics constructor 2 is used in the PhysicsList class. Alternative constructor can be selected from microyz.in. Livermore and Penelope physics lists can be used as well. Tracking cut and maximum step size can be selected in the macro file microyz.in 4) Scoring of enery deposition Energy depositions are scored in spheres randomly placed along the incident particle track, using a weighted sampling. The user can select in the TrackerSD class the radius of the sphere (5 nm by default). 5) The code can be run using: ./microyz microyz.in 6) Results can be analyzed after the run using: root plot.C The distribution of y is shown by default. The following quantities are calculated: yF and yD.