 | NEST - Nuclear Emergency Search Team
 | Concepts |
|
| Nuclear Weapon |
| Atomic Structure |
| Nuclear Fission
| Fission Barrier |
| Induced Fission |
| Spontaneous Fission |
| Fission Cross Section |
| Stages of Fission |
| Chain Reaction
 | Non-sustaining |
| Sustaining |
| Multiplying |
|
| Criticality
| Reproduction Factor |
|
| Factors Affecting Criticality
| Amount |
| Shape |
| Density |
| Enrichment |
| Environment
| Moderation |
| Tamper |
| Capture |
|
| Purity |
|
| Isotope Data
| Half-life |
| Thermal Fission Cross Section |
| Prompt Neutrons |
| Fission Energy Release |
| The Event |
| Fragment Distribution |
| Energy Distribution |
| Time Scale |
| Relationship (Fission Generations vs. Yield) |
|
| Separation of Isotopes
| Enrichment Terminology |
| Gaseous Diffusion |
| Nozzle Separation |
| Gas Centrifuge Method |
| Atomic Vapor Isotope Separation (AVLIS) |
| Plasma Separation Process (PSP) |
|
| Production of Plutonium
| Fertile Isotope |
| Categories of Plutonium
| Pu240 |
| Preinitiation |
|
| Pu Extraction |
| Pu Phases |
|
| Basic Principles
| Gun Assembly |
| Implosion Assembly |
| Boosting |
|
|
| Fusion
| Principle
| Production of Tritium |
| Production of Deuterium |
| ICF (Teller Ulam) initiated by x-rays from magnetically imploded
plasma |
| hyper velocity stagnation ICF |
| Thermonuclear Reactions |
|
| Comparison (Fission vs. Fusion)
| Energy Released |
| Radiation |
|
|
| Cold Fusion
| DT enriched solution w/Depleted Uranium electrode (odd thought) |
|
| Advanced concepts
| Neutron |
| EMP |
| Hot X-ray (tailored radiation) |
| Cold X-ray
| Exo-atmospheric |
|
| Microwave |
| Directed, Focused or Shaped systems |
| Pump for directed energy systems |
|
| Metal Burning Cycle |
| Staged Systems
| Hydrodynamic Coupled Stages |
| Neutron Coupled |
| Radiation Coupled |
|
| Neutron Pulse Initiated System |
| Computer Programs |
| Hydrodynamics
| Shock Waves (elastic, plastic, solid) |
| Rankine-Hugoniot |
| Eulerion Coordinate |
| Lagrangian Coordinate |
| Taylor Instibilittty |
| hydrodynamic tuning |
|
| Opacities
| Diffusion Approximation
| Rosseland Mean Opacity |
|
| Radiation Surface Approximation
| Plank Mean Opacity |
|
| Absorption Coefficient |
| Attenuation Coefficient |
| Mean Free Path |
| Opacity |
| Karzas-Latter type Calculation |
|
| Equations of State (EoS)
| Hugoniot |
| Thomas Fermi Diric (TMF) EoS |
|
| Primary - The fission trigger or first stage of a multistage thermonuclear
weapon or device. |
| Secondary - A nuclear stage physically separate from the primary. |
| Shell
| Radiation Case - Radiation cavity or hohlraum - An envelope, opaque to
x-rays used to confine radiation in a staged weapon. |
| Radiation Channel - Space within the radiation case through which
radiation flows and surrounds the secondary. |
| The band of X-rays most favorable for efficient compression is know to
be centered around 30 nanometers. |
|
| Channel filler - use of intermediate-weight elements of specific opacity
for the channel fillers help to "filter" the x-ray radiation
created by the primary, Fillers composed of silicon and tantalum which
absorb on either side of 30 nanometers, to filter the x-rays.
| Suitable mixtures of these two elements should, generate a plasma that
is transparent to only soft x-rays, suppressing the hard x-rays that
preheat the fuel and ultraviolet energy that is too soft to generate
efficient compression. |
|
|
| Isotope |
half-life |
Thermal Fission Cross Section |
Range of Measurement |
Accuracy |
Reference |
| Am-242m |
152 years |
6600 ± 30b |
0.01 eV - 20 MeV |
10-20% |
Bro + 78 |
| Cm-243 |
28 years |
600 ± 50b |
20 eV - 3 MeV |
|
Sil 76 |
| |
|
|
.4 eV - 100 keV |
|
Dab + 79 |
| Cm-245 |
8.5 · 103 years |
2020 ± 40b |
20 eV - 3 MeV |
|
Mk 71 |
| |
|
|
.01 eV - 35 eV |
3% |
BBK 78 |
| |
|
|
.4 eV - 100 keV |
|
Dab + 79 |
| U-233 |
1.62 · 106 years |
529.2 ± 1.4b |
|
|
Lem 75 |
| U-235 |
|
583.5 ± 1.3b |
|
|
Lem 75 |
| Pu-239 |
2.44 · 104 years |
744.0 ± 2.5b |
|
|
Lem 75 |
| Pu-241 |
|
1015 ± 7b |
|
|
Lem 75 |
|
