The discussion clarifies the distinction between neutron flux and current in the context of calculations using MCNP (Monte Carlo N-Particle Transport Code). Neutron flux is defined as a scalar quantity with units of neutrons/(cm²·sec), representing the flow of neutrons per unit area per unit time. In contrast, neutron current is a vector quantity, expressed in units of neutrons/second, indicating the flow of neutrons over time. The current can be derived by integrating the flux over a specified surface area, and the ratio of total neutron current to total neutron flux can be calculated based on the specific problem parameters provided in MCNP.
PREREQUISITESResearchers, physicists, and engineers working with neutron transport simulations, particularly those utilizing MCNP for radiation analysis and calculations.
Flux is a scalar value, while current is a vector, which has a direction.LeeGru said:Guys, I need to calculate the flux and current of neutron by MCNP.So what's the difference between them ,and How to calculate them?
I need to calculate the ratio between the total neutron current and the total neutron flux.How could obtain this value?Astronuc said:Flux is a scalar value, while current is a vector, which has a direction.
Is the question about neutron current (or particle current) or current density?
Thank you very much.I need to calculate the ratio between the total neutron current and the total neutron flux.How could I obtain this value in MCNPphyzguy said:Flux is a flow/area/time, so in the case of neutrons it would have units like neutrons/(cm^2 - sec). Current is a flow/time, so it would have units like neutrons/second. So the current will be the flux integrated over some surface. How you calculate theme depends on the problem given.