Hi folks, I'm working on Fluka nowadays which you can found from here if you are not familiar. It's a very useful and widely used Monte Carlo simulation package. My main goal is to be able to perform total cross section calculation with it. So far, please consider I'm a rookie, I've done some calculations about energy deposition such as a proton beam hitting to a water target. I really would like to perform a calculation about the total cross section for the 24_Mg(n,TOT) reaction and compare the results with the EXFOR data. The energy range of n particles from EXFOR is between 1.02e6 - 5.19e6 eV which means I have to run the Fluka between those energy ranges. It seems ok, I am able to arrange the energy of incoming particles but the main issue is which card am I going to use to get the cross section calculation from Fluka. Here are some possible cards that I'm still working on them : - USRYIELD - USRBDX - USRBIN - USRCOLL - USRTRACK So any one who has something to say about that, any kind of help is sincerely accepted. Best wishes.