6.9 Appendix I: Glossary of Symbols
237
a S
surface-energy parameter in fission analysis (~ 18 MeV)
a C
Coulomb-energy parameter in fission analysis (~ 0.72 MeV)
a O
empirical parameter involved in nuclear sizes (~ 1.2 fm)
B
parameter in analysis of fission barrier (1.89); magnetic field strength
(Sect. 3.4); boron to carbon number ratio (Sect. 4.1); bulk modulus
(Sect. 4.2)
b
astronomical brightness; Sect. 5.2
C
compression ratio in discussion of tamped criticality (Sects. 2.3 and
2.5); number of bare-threshold critical masses in bomb core (Sect. 2.4);
constant of integration in electromagnetic separation of isotopes analysis (Sect. 3.4); constant in analysis of barrier diffusion (Sect. 3.5);
solar constant (Sect. 5.2)
c
speed of light
D
diffusion coefficient (2.20); constant of integration in electromagnetic
separation of isotopes analysis (Sect. 3.4)
d
product-nuclei separation in simulation of fission barrier (Sect. 1.11);
characteristic length in criticality calculations, sometimes with
subscripts core and tamp for core and tamper; fundamental definition
in (2.25)
d AU
distance in Astronomical Units (Sect. 5.2)
d O
characteristic length in criticality calculations as d above but for case
of bare threshold criticality (α = 0)
d pc
distance in parsecs (Sect. 5.2)
E
energy; often meaning a mc
2 rest energy; may be accompanied with
a subscript to designate a particular particle; constant of integration in
electromagnetic separation of isotopes analysis (Sect. 3.4)
E barrier
fission barrier energy
E f
energy liberated per fission reaction, typically ~180 MeV
E m mc
2
rest energy
E γ
pre-collision gamma-ray energy in analysis of neutron
discovery (Sect. 1.4)
E γ *
post-collision gamma-ray energy in analysis of neutron
discovery (Sect. 1.4)
e
electron charge
F
parameter in analysis of fission barrier (1.89); logarithm of number of
fissions by which time the nuclear explosion within a core has become
established (Sect. 4.3); fractional abundance of
235 U in reactor criticality calculation (Sect. 3.1); isotope fractional abundance in boroncontamination analysis (Sect. 4.1); spontaneous fission rate (4.4) in
Sect. 4.2; isotope fractional abundance in reactor fuel (Sect. 5.3)
f
mass ratio of products in fission analysis (1.45) in Sect. 1.7
f linear (x) function in analysis of fission barrier (1.87) in Sect. 1.10
f smooth (x) function in analysis of fission barrier (1.89) and (1.90) in Sect. 1.10
f S (γ )
surface-area function in simulation of fission barrier (1.107)
f V (γ )
volume function in simulation of fission barrier (1.101)
g
parameter in predetonation analysis (4.10)
237
a S
surface-energy parameter in fission analysis (~ 18 MeV)
a C
Coulomb-energy parameter in fission analysis (~ 0.72 MeV)
a O
empirical parameter involved in nuclear sizes (~ 1.2 fm)
B
parameter in analysis of fission barrier (1.89); magnetic field strength
(Sect. 3.4); boron to carbon number ratio (Sect. 4.1); bulk modulus
(Sect. 4.2)
b
astronomical brightness; Sect. 5.2
C
compression ratio in discussion of tamped criticality (Sects. 2.3 and
2.5); number of bare-threshold critical masses in bomb core (Sect. 2.4);
constant of integration in electromagnetic separation of isotopes analysis (Sect. 3.4); constant in analysis of barrier diffusion (Sect. 3.5);
solar constant (Sect. 5.2)
c
speed of light
D
diffusion coefficient (2.20); constant of integration in electromagnetic
separation of isotopes analysis (Sect. 3.4)
d
product-nuclei separation in simulation of fission barrier (Sect. 1.11);
characteristic length in criticality calculations, sometimes with
subscripts core and tamp for core and tamper; fundamental definition
in (2.25)
d AU
distance in Astronomical Units (Sect. 5.2)
d O
characteristic length in criticality calculations as d above but for case
of bare threshold criticality (α = 0)
d pc
distance in parsecs (Sect. 5.2)
E
energy; often meaning a mc
2 rest energy; may be accompanied with
a subscript to designate a particular particle; constant of integration in
electromagnetic separation of isotopes analysis (Sect. 3.4)
E barrier
fission barrier energy
E f
energy liberated per fission reaction, typically ~180 MeV
E m mc
2
rest energy
E γ
pre-collision gamma-ray energy in analysis of neutron
discovery (Sect. 1.4)
E γ *
post-collision gamma-ray energy in analysis of neutron
discovery (Sect. 1.4)
e
electron charge
F
parameter in analysis of fission barrier (1.89); logarithm of number of
fissions by which time the nuclear explosion within a core has become
established (Sect. 4.3); fractional abundance of
235 U in reactor criticality calculation (Sect. 3.1); isotope fractional abundance in boroncontamination analysis (Sect. 4.1); spontaneous fission rate (4.4) in
Sect. 4.2; isotope fractional abundance in reactor fuel (Sect. 5.3)
f
mass ratio of products in fission analysis (1.45) in Sect. 1.7
f linear (x) function in analysis of fission barrier (1.87) in Sect. 1.10
f smooth (x) function in analysis of fission barrier (1.89) and (1.90) in Sect. 1.10
f S (γ )
surface-area function in simulation of fission barrier (1.107)
f V (γ )
volume function in simulation of fission barrier (1.101)
g
parameter in predetonation analysis (4.10)