Dear expert:
In order to simulate the energy response, a neutron detector was used to respond by colliding neutrons with the BF3 proportional counter tube. The Flair graphical interface in the Fluka program was used to simulate the input, and three cards, usrtrack, resnucleus, and usrbin, were used to calculate the energy response. What are the units of the three cards first? What is the unit of energy response in the calculation of neutron dose detector energy response? Is it in square centimeters? How can we calculate square centimeters based on the units of three cards? Looking forward to your reply, thank you!
Considering that this is your third identical post on this matter (after November 2024 and June 2025), let’s try together to better understand each other, so as to prevent a fourth one from scratch.
As @anwaets earlier answered, RESNUCLEi gives you the average number of nuclides (e.g., 7Li) stopping in the selected region per incoming neutron. Since you specified the volume, this dimensionless number turns out to be divided by the latter [cm^-3].
USRBIN by region gives you the average energy [GeV] deposited in a region per incoming neutron.
USRTRACK - when embedding the region volume - gives you the average differential fluence [cm^-2 GeV^-1] in the selected region per incoming neutron, as a function of the secondary neutron energy (as well as its integral in cm^-2).
Having said that, which repeats what the chosen cards give, it’s not clear to me what you want to achieve and what you call energy response (as well as its unit). If you want to know how many 7Li are produced on average by your incoming 5 GeV/c neutron beam, RESNUCLEi provides the answer, independently of the energy deposited in the BF3 region, which may be affected by many different contributions (look at all particles traveling over that region, by adding other USRTRACK cards applying to other secondary particle types).