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L²Level 0 · Kind of Quantity

L² quantities

grandeurs L²

12 quantities of this kind. All share dimension L² and can be compared, added, and converted between units.

Corresponding UnitsDB dimension
area
NISTd8 · d:area
Part 3: Space and Time1 of 42 entries
3-3
area, areaA
extent of a two-dimensional geometrical shape
Part 5: Thermodynamics1 of 54 entries
5-11
thermal insulance, coefficient of thermal insulanceM
inverse of coefficient of heat transfer : where is coefficient of heat transfer (t5-10.1)
Part 7: Light and Radiation2 of 66 entries
7-6.1
radianceL_"e"
density of radiant intensity with respect to projected area in a specified direction at a specified point on a real or…
ent
7-6.2
spectral radianceL_("e",lambda)
density of radiance with respect to wavelength, expressed by where is radiance (t7-6.1) in terms of wavelength…
Part 10: Atomic and Nuclear8 of 125 entries
10-18
nuclear quadrupole momentQ
component of the diagonalized tensor of nuclear quadrupole moment: in the quantum state with the nuclear spin in the…
10-38.1
cross section <atomic physics>sigma
for a specified target entity and for a specified reaction or process produced by incident charged or uncharged…
10-38.2
total cross section <atomic physics>sigma_"tot"
sum of all cross sections (t10-38.1) corresponding to the various reactions or processes between an incident particle…
10-39
direction distribution of cross section <atomic physics>sigma_(ii(Omega))
differential quotient of with respect to , where is the cross section (t10-38.1) for ejecting or scattering a particle…
10-52
atomic attenuation coefficientmu_"a"
quotient of the linear attenuation coefficient (t10-49) and the number density (t10-62.1), , of atoms in the substance:
ent
10-72.1
slowing-down areaL_"s"^2
in an infinite homogenous medium, one-sixth of the mean square of the distance (iso80000-3) between the neutron source…
ent
10-72.2
diffusion areaL^2
in an infinite homogenous medium, one-sixth of the mean square distance (iso80000-3) between the point where a neutron…
ent
10-72.3
migration areaM^2
sum of the slowing-down area (t10-72.1) from fission energy to thermal energy (iso80000-5) and the diffusion area…