Best parameter for calculate Backscatter factor

[tairozero]

I want to calculate the backscatter factor in general radiography

However, I don't sure about the parameters and I found that DOSxyznrc have many settings and interactions. Do anyone have the set of parameter to recommend for me?

This is the setting that I used

 :Start MC Transport Parameter:
 
 Global ECUT= 0.521
 Global PCUT= 0.001
 Global SMAX= 1e10
 ESTEPE= 0.25
 XIMAX= 0.5
 Boundary crossing algorithm= EXACT
 Skin depth for BCA= 3
 Electron-step algorithm= PRESTA-II
 Spin effects= On
 Brems angular sampling= Simple
 Brems cross sections= NIST
 Bound Compton scattering= On
 Compton cross sections= default
 Pair angular sampling= Simple
 Pair cross sections= BH
 Photoelectron angular sampling= Off
 Rayleigh scattering= On
 Atomic relaxations= On
 Electron impact ionization= On
 Photon cross sections= xcom
 Photon cross-sections output= Off

Thank you

[rtownson]

These settings are fine, or remove all but the ECUT and PCUT and it will use the defaults. With EGSnrc it's generally a good idea to use the defaults.

[tairozero]

Thank you for your information.