240
6 Appendices
U C
Coulomb energy in fission analysis (Sects. 1.7, 1.11, 6.5)
U S
surface energy in fission analysis (Sects. 1.7, 1.11, 6.5)
U E , U total total electrostatic energy U S + U C in fission analysis
u
atomic mass unit
V
volume; usually of bomb core
V acc
accelerating voltage in electromagnetic separation of isotopes
(Sect. 3.4)
v
speed
v neut
neutron speed
v mp
most probable speed (3.9)
x
fissility parameter (1.86) penetration distance in neutron escape probability (Sect. 2.1); dimensionless length parameter in criticality calculations (2.26); reduced path-length neutron travel distance in spherical
escape probability calculation (6.74) in Sect. 6.6
x 1 , x 2 , x 3
Parameters in alysis of composite-core criticality (2.72)
Y
bomb energy yield (2.95)
y
yield of nuclear reaction, usually applied to (α, n) reactions (Sect. 4.4)
Z
atomic (proton) number
Greek letters
α alpha particle
parameter in analysis of neutron discovery (1.23);
parameter in analysis of spontaneous-fission limit (1.50);
parameter in analysis of secondary-neutron energy spectrum (1.64);
neutron-density exponential growth parameter introduced in (2.22);
separation constant in analysis of electromagnetic separation of isotopes (3.29)
in Sect. 3.4;
parameter in analysis of two-body to two-body collision; in Sect. 6.3;
parameter in analysis of two-body to massive particle plus gamma-ray collision in Sect. 6.4
α O
design value of neutron-density exponential growth parameter (Sect. 4.3)
α 0 , α 2 surface-distortion parameters in Bohr-Wheeler analysis of fission (Sect. 6.5)
β
parameter in analysis of spontaneous-fission limit (1.55);
angle in simulation of fission barrier (Sect. 1.11);
parameter in Peierls’ analysis of criticality (2.123);
parameter in analysis of two-body to two-body collision in Sect. 6.3
γ
parameter in analysis of spontaneous-fission limit (1.56);
angle in simulation of fission barrier (Sect. 1.11);
gas/radiation pressure constant (Sects. 2.5 and 2.6);
parameter in analysis of two-body to two-body collision (Sect. 6.3)
mass excess in MeV (1.10)
E fission barrier
6 Appendices
U C
Coulomb energy in fission analysis (Sects. 1.7, 1.11, 6.5)
U S
surface energy in fission analysis (Sects. 1.7, 1.11, 6.5)
U E , U total total electrostatic energy U S + U C in fission analysis
u
atomic mass unit
V
volume; usually of bomb core
V acc
accelerating voltage in electromagnetic separation of isotopes
(Sect. 3.4)
v
speed
v neut
neutron speed
v mp
most probable speed (3.9)
x
fissility parameter (1.86) penetration distance in neutron escape probability (Sect. 2.1); dimensionless length parameter in criticality calculations (2.26); reduced path-length neutron travel distance in spherical
escape probability calculation (6.74) in Sect. 6.6
x 1 , x 2 , x 3
Parameters in alysis of composite-core criticality (2.72)
Y
bomb energy yield (2.95)
y
yield of nuclear reaction, usually applied to (α, n) reactions (Sect. 4.4)
Z
atomic (proton) number
Greek letters
α alpha particle
parameter in analysis of neutron discovery (1.23);
parameter in analysis of spontaneous-fission limit (1.50);
parameter in analysis of secondary-neutron energy spectrum (1.64);
neutron-density exponential growth parameter introduced in (2.22);
separation constant in analysis of electromagnetic separation of isotopes (3.29)
in Sect. 3.4;
parameter in analysis of two-body to two-body collision; in Sect. 6.3;
parameter in analysis of two-body to massive particle plus gamma-ray collision in Sect. 6.4
α O
design value of neutron-density exponential growth parameter (Sect. 4.3)
α 0 , α 2 surface-distortion parameters in Bohr-Wheeler analysis of fission (Sect. 6.5)
β
parameter in analysis of spontaneous-fission limit (1.55);
angle in simulation of fission barrier (Sect. 1.11);
parameter in Peierls’ analysis of criticality (2.123);
parameter in analysis of two-body to two-body collision in Sect. 6.3
γ
parameter in analysis of spontaneous-fission limit (1.56);
angle in simulation of fission barrier (Sect. 1.11);
gas/radiation pressure constant (Sects. 2.5 and 2.6);
parameter in analysis of two-body to two-body collision (Sect. 6.3)
mass excess in MeV (1.10)
E fission barrier