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sci.neutron-moderation-ratio Calculator
Calculates neutron moderation ratio to compare moderator materials for nuclear reactor design. Heavy water has far better moderation ratio than light water — CANDU reactors use heavy water to achieve criticality with natural uranium fuel.
Inputs
Moderator Atomic Mass A
Total mass (kg). Distinct from weight — weight = mass × gravity. Mass is constant; weight varies with location.
Hydrogen Fraction
Reference formula or conversion factor shown for context.
Results
mean log energy decrement ξ
Arithmetic average — sum divided by count. Simple and familiar, but pulled by outliers. If your data contains extreme values, the median may be more representative.
scattering cross section (barn)
The value at the specified point or condition.
moderating ratio
A standardised quality or risk rating on the applicable scale.
H₂O moderating ratio
A standardised quality or risk rating on the applicable scale.