From eef4cca52b1cf10951406d4649ec7a298066b3a1 Mon Sep 17 00:00:00 2001 From: Dane Sabo Date: Tue, 17 Sep 2024 19:18:40 -0400 Subject: [PATCH] vault backup: 2024-09-17 19:18:40 --- .../2024-09-17 Module 5 Nuclear Fission Basics.md | 2 ++ 1 file changed, 2 insertions(+) diff --git a/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-17 Module 5 Nuclear Fission Basics.md b/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-17 Module 5 Nuclear Fission Basics.md index 52581436..b27154a8 100644 --- a/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-17 Module 5 Nuclear Fission Basics.md +++ b/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-17 Module 5 Nuclear Fission Basics.md @@ -36,3 +36,5 @@ Rate of increase = Production - absorbed - leakage $$k = \frac{\text{Number of neutrons in one generation}}{\text{Number of neutrons in preceding generation}}$$ Measures how many neutrons produced by each neutron born. There are more formulas in the slides. K can be based on material properties +## Energy Dependence +Fission is most efficiently caused by thermal neutrons (energy < 1eV), but neutrons from fission are born at something like \>2MeV. 7 orders of magnitude reduction -- usually kinetic losses by neutrons colliding with things.