Please provide the used software versions.
FLUKA:4.5.1
Flair:
If I want to implement a Watt spectrum for neutron beam particle energy, could I use multiple beams with different energies and number of tracked particles to represent the watt spectrum. Are there other ways where I could sample the initial energy for each particle from the Watt spectrum ?
The Watt spectrum is a probability distribution P(E), indicating that a fission neutron has an energy between E and E+dE.
To implement such a probability distribution as a particle source in FLUKA you have to use a SOURCE subroutine. Please consult the course file “Source routine”:
Due to the mathematical form of the Watt spectrum you will have to generate an energy-probability histogram file (e.g. with help of a spreadsheet) from which FLUKA can read the values via the source routine.