238
6 Appendices
h
Planck’s constant; final height of distorted nucleus in simulation
of fission barrier (1.109); parameter in Newton’s Law of Cooling
(Sect. 5.1)
i
electrical current
J km
m’th zero of Bessel function of order k (Sect. 2.9)
K
kinetic energy; often accompanied with a subscript to designate a particular particle normalization; constant in analysis of secondary-neutron
energy spectrum (1.67)
K x , K y
constants of integration in electromagnetic separation of isotopes
analysis (Sect. 3.4)
k
reproduction constant in reactor criticality, sometimes with subscript
slow or fast (Sect. 3.1)
k B
Boltzmann’s constant
k z
separation constant in analysis of cylindrical criticality (2.152) and
(2.163)
k φ
separation constant in analysis of cylindrical criticality (2.155) and
(2.169)
L
length of cylindrical bomb core (Sect. 2.9); side length of magnet coil
(Sect. 3.4); stellar luminosity (Sect. 5.2)
M core
mass of bomb core
m
mass; astronomical apparent magnitude (Sect. 5.2) with subscripts A
and B
N
sometimes used as number of neutrons; number of cells in simulation
of fission barrier (Sect. 1.11); neutron number density in criticality and
diffusion calculations, sometimes with super/sub-scripts (core, tamp)
for core and tamper and (r, t) for radial and time-dependences (Chap. 2);
number of scatterings in neutron thermalization (Sect. 3.2); equivalent
number of Suns of Trinity brightness (Sect. 5.2); number of atoms in
fuel for reactor simulation (Sect. 5.3)
N A
Avogadro’s number
N esc
number of neutrons that penetrate through a sample (Sect. 2.1); number
of neutrons in “escape cylinder” in diffusion and diffusion-equation
calculations (Sects. 3.5, 6.7)
N O
number of incident neutrons bombarding a sample (Sects. 2.1, 2.2,
2.4 and 2.5); initial number density of neutrons in center of bomb core
(2.22)
n
nuclear number density (2.1)
n H
nuclear number density of heavy-element fissile material in impurity
calculations (Sect. 4.4)
n L
nuclear number density of light-element impurity (Sect. 4.4)
P
pressure, usually within bomb core as (2.87); sometimes used for
probability
P(dΩ)
probability of particle moving in direction of solid angle dΩ; (3.49)
6 Appendices
h
Planck’s constant; final height of distorted nucleus in simulation
of fission barrier (1.109); parameter in Newton’s Law of Cooling
(Sect. 5.1)
i
electrical current
J km
m’th zero of Bessel function of order k (Sect. 2.9)
K
kinetic energy; often accompanied with a subscript to designate a particular particle normalization; constant in analysis of secondary-neutron
energy spectrum (1.67)
K x , K y
constants of integration in electromagnetic separation of isotopes
analysis (Sect. 3.4)
k
reproduction constant in reactor criticality, sometimes with subscript
slow or fast (Sect. 3.1)
k B
Boltzmann’s constant
k z
separation constant in analysis of cylindrical criticality (2.152) and
(2.163)
k φ
separation constant in analysis of cylindrical criticality (2.155) and
(2.169)
L
length of cylindrical bomb core (Sect. 2.9); side length of magnet coil
(Sect. 3.4); stellar luminosity (Sect. 5.2)
M core
mass of bomb core
m
mass; astronomical apparent magnitude (Sect. 5.2) with subscripts A
and B
N
sometimes used as number of neutrons; number of cells in simulation
of fission barrier (Sect. 1.11); neutron number density in criticality and
diffusion calculations, sometimes with super/sub-scripts (core, tamp)
for core and tamper and (r, t) for radial and time-dependences (Chap. 2);
number of scatterings in neutron thermalization (Sect. 3.2); equivalent
number of Suns of Trinity brightness (Sect. 5.2); number of atoms in
fuel for reactor simulation (Sect. 5.3)
N A
Avogadro’s number
N esc
number of neutrons that penetrate through a sample (Sect. 2.1); number
of neutrons in “escape cylinder” in diffusion and diffusion-equation
calculations (Sects. 3.5, 6.7)
N O
number of incident neutrons bombarding a sample (Sects. 2.1, 2.2,
2.4 and 2.5); initial number density of neutrons in center of bomb core
(2.22)
n
nuclear number density (2.1)
n H
nuclear number density of heavy-element fissile material in impurity
calculations (Sect. 4.4)
n L
nuclear number density of light-element impurity (Sect. 4.4)
P
pressure, usually within bomb core as (2.87); sometimes used for
probability
P(dΩ)
probability of particle moving in direction of solid angle dΩ; (3.49)
probability of neutron escape from a sphere; defined in (4.9) (Sects. 4.2,
6.6)