For Students · Neutron Transport
Neutron Transport for an X-ray dose
Built for students learning it for a class or exam. See the concept move instead of memorizing formulas — and check your homework intuition. Simulate an X-ray dose live below — adjust the inputs and watch it respond, right in your browser.
Neutron TransportLive
random walk & moderation
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Neutrons do not travel straight — they random-walk through matter, scattering every mean free path and losing energy at each collision. This moderation slows fast neutrons to thermal speeds where they fission efficiently. A short mean free path (dense material) keeps them inside; a long one lets them leak out, which is why reactor size and geometry set criticality.
Data Inspector
Mean free path30 px
Escaped0 / 40
Leakage0%
Governing equation
Reading this result: A moderate mean free path balances moderation against leakage — enough scattering to thermalize neutrons, but geometry still governs whether the core goes critical.
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- Is this good for students?
- Yes — this version of "Neutron Transport for an X-ray dose" is framed for students learning it for a class or exam. See the concept move instead of memorizing formulas — and check your homework intuition.
- Do I need to install anything?
- No. It runs in any modern browser, free, with no account required.