6.9 Appendix I: Glossary of Symbols
241
r bare-core expansion distance to second criticality (2.91)
δ
parameter in analysis of neutron discovery (1.25);
neutron-density exponential growth parameter for tamper material (Sect. 2.3);
parameter in analysis of composite-core criticality (Sect. 2.4);
parameter in analysis of two-body to massive particle plus gamma-ray collision
(Sect. 6.4)
ε
parameter in analysis of neutron discovery (1.24);
parameter in analysis of energy distribution of fission-liberated neutrons (1.71);
parameter in criticality calculations (2.31);
parameter in analysis of two-body to massive particle plus gamma-ray
collision(Sect. 6.4)
ε O permittivity of free space
η
numerical factor in simulation of fission barrier related to final height of nucleus
(1.109)
θ
polar angle in simulation of fission barrier (Sects. 1.11, 6.5)
κ
parameter in analysis of cylindrical criticality (2.158)
λ
mean free path; super/subscript indicates process type (fission, capture,
scattering…) and core or tamper if necessary
parameter in analysis of composite-core criticality; Sect. 2.4
μ
mass excess (Sect. 1.1)
average number of spontaneous fissions in predetonation analysis (Sects. 4.2,
4.3)
μ O permeability of free space (Sect. 3.4)
ν
number of secondary neutrons liberated per fission
ξ
parameter in Peierls’ analysis of criticality (2.118)
Φ neutron flux(Sects. 3.3 and 4.5)
π k probability of neutron escape following k scatterings in predetonation analysis
(Sect. 4.2)
ρ
mass density; charge density; occasionally used as a number density;
reduced radial neutron travel distance in spherical escape probability calculation (6.73) in Sect. 6.6
surface area of sample under neutron bombardment (Sect. 2.1);
parameter in analysis of neutron escape from within a sphere (Sect. 6.6)
C Coulomb-energy function in simulation of fission barrier (1.115)
S surface-energy function in simulation of fission barrier (1.111)
σ
reaction cross-section; subscript indicates reaction type (fission, capture,
scattering…)
τ
neutron travel time between fissions (2.21)
241
r bare-core expansion distance to second criticality (2.91)
δ
parameter in analysis of neutron discovery (1.25);
neutron-density exponential growth parameter for tamper material (Sect. 2.3);
parameter in analysis of composite-core criticality (Sect. 2.4);
parameter in analysis of two-body to massive particle plus gamma-ray collision
(Sect. 6.4)
ε
parameter in analysis of neutron discovery (1.24);
parameter in analysis of energy distribution of fission-liberated neutrons (1.71);
parameter in criticality calculations (2.31);
parameter in analysis of two-body to massive particle plus gamma-ray
collision(Sect. 6.4)
ε O permittivity of free space
η
numerical factor in simulation of fission barrier related to final height of nucleus
(1.109)
θ
polar angle in simulation of fission barrier (Sects. 1.11, 6.5)
κ
parameter in analysis of cylindrical criticality (2.158)
λ
mean free path; super/subscript indicates process type (fission, capture,
scattering…) and core or tamper if necessary
parameter in analysis of composite-core criticality; Sect. 2.4
μ
mass excess (Sect. 1.1)
average number of spontaneous fissions in predetonation analysis (Sects. 4.2,
4.3)
μ O permeability of free space (Sect. 3.4)
ν
number of secondary neutrons liberated per fission
ξ
parameter in Peierls’ analysis of criticality (2.118)
Φ neutron flux(Sects. 3.3 and 4.5)
π k probability of neutron escape following k scatterings in predetonation analysis
(Sect. 4.2)
ρ
mass density; charge density; occasionally used as a number density;
reduced radial neutron travel distance in spherical escape probability calculation (6.73) in Sect. 6.6
surface area of sample under neutron bombardment (Sect. 2.1);
parameter in analysis of neutron escape from within a sphere (Sect. 6.6)
C Coulomb-energy function in simulation of fission barrier (1.115)
S surface-energy function in simulation of fission barrier (1.111)
σ
reaction cross-section; subscript indicates reaction type (fission, capture,
scattering…)
τ
neutron travel time between fissions (2.21)