Sets the size of the step of muons and charged hadrons to a fixed fraction of the kinetic energy in different materials See also EMFFIX, MULSOPT, STEPSIZEWHAT(1)= fraction of the kinetic energy to be lost in a step (cannot be > 0.2)Default: if option DEFAULTS is used withSDUM= ICARUS, the default is 0.02. WithSDUM= HADROTHErapy or PRECISIOn, the default is 0.05. IfSDUM= CALORIMEtry, the default is 0.08. With any otherSDUMvalue, or if DEFAULTS is missing, the default is 0.1.WHAT(2)= "epsilon" parameter used to check the finite size of the nucleus when the nuclear form factor is not invoked by the multiple scattering algorithm (see Note 3 below) For code development only, do not change!Default= 0.15WHAT(3)= high-energy limit for the fraction of energy to be lost in a step (the fraction is given byWHAT(3)timesWHAT(1)) For code development only, do not change!Default= 0.012WHAT(4)= lower index bound (or corresponding name) of materials where the specified energy loss per step is to be applied (From materialWHAT(4)...)Default= 3WHAT(5)= upper index bound (or corresponding name) of materials where the specified energy loss per step is to be applied (... to materialWHAT(5)...)Default=WHAT(4)WHAT(6)= step length in assigning indices (...in steps ofWHAT(6))Default= 1SDUM: not usedDefault(option FLUKAFIX not given): the defaults listed above applyNotes:1) Usually there is no need for changing the general default value of 10% (0.1) forWHAT(1)2) The input value is actually applied as such only at intermediate energies (between about a few tens of MeV and 1 GeV): at low energies it is slowly increased to twice the requested value, while at high energies it decreases to a limit usually about one hundredth of the input value. Example (number based): FLUKAFIX 0.03 0. 0. 21. 0. 0. The same example, name-based: FLUKAFIX 0.03 0. 0. CALCIUM 0. 0.
Previous Index Next