Quantity |
Level
Cat. |
Use
Id. |
Name |
Convesion factors to SI units (1 unit equals)
|
Represen.
Symbol |
Cross
ref. |
|
| Atomic and Nuclear Physics
|
|
proton number, atomic number
|
1
|
|
one
|
|
1
|
692
|
|
neutron number
|
1
|
|
one
|
|
1
|
693
|
|
nucleon number, mass number
|
1
|
|
one
|
|
1
|
694
|
|
mass of atom (of a nuclide x),
|
1
|
|
kilogram
|
|
kg
|
695
|
|
nuclidic mass
|
1
|
|
unified atomic mass unit
|
1,660 540 2 x 10-27 kg
|
u |
696
|
|
unified atomic mass constant
|
|
|
|
|
|
|
|
(rest) mass of electron
|
1
|
|
one
|
|
1
|
698
|
|
(rest) mass of proton
|
|
|
|
|
|
|
|
(rest) mass of neutron
|
|
|
|
|
|
|
|
mass excess
|
1
|
|
kilogram
|
|
kg |
701
|
|
mass defect
|
1
|
|
unified atomic mass unit
|
1,660 540 2 x 10-27 kg
|
u |
702
|
|
relative mass excess
|
1
|
|
one
|
|
1
|
703
|
|
relative mass defect
|
|
|
|
|
|
|
|
packing fraction
|
1
|
|
one
|
|
1
|
705
|
|
binding fraction
|
|
|
|
|
|
|
|
elementary charge
|
1
|
|
coulomb
|
|
C
|
707
|
|
Planck constant
|
1
|
|
joule second
|
|
J.s
|
708
|
|
Bohr radius
|
1
|
|
metre
|
|
m
|
709
|
| |
1
|
|
ångström
|
10-10m (exactly)
|
Å
|
710
|
|
Rydberg constant
|
1
|
|
reciprocal metre
|
|
m-¹
|
711
|
|
Hartree energy
|
1
|
|
joule
|
|
J
|
712
|
|
magnetic moment of partical or
nucleus
|
1
|
|
ampere square metre
|
|
A.m²
|
713
|
|
Bohr magneton
|
|
|
|
|
|
|
|
nuclear magneton
|
|
|
|
|
|
|
gyromagnetic coefficient,
(gyromagnetic ratio)
|
1
|
|
ampere square metre per joule
second
|
|
A.m²/(J.s)
|
716
|
|
g-factor of atom or electron
|
1
|
|
one
|
|
1
|
717
|
|
g-factor of nucleus or nuclear
particle
|
|
|
|
|
|
|
|
Larmor angular frequency
|
1
|
|
reciprocal second
|
|
s-¹
|
719
|
|
nuclear precession
|
1
|
|
radian per second
|
|
rad/s |
720
|
|
cyclotron angular frequency
|
|
|
|
|
|
|
|
nuclear quadrupole moment
|
1
|
|
square metre
|
|
m²
|
722
|
|
nuclear radius
|
1
|
|
metre
|
|
m
|
723
|
|
electron radius
|
|
|
|
|
|
|
|
Compton wavelength
|
|
|
|
|
|
|
|
orbital angular momentum quantum
number
|
1
|
|
one
|
|
1
|
726
|
|
spin angular momentum quantum
number
|
1
|
|
one
|
|
1
|
727
|
|
total angular momentum quantum
number
|
1
|
|
one
|
|
1
|
728
|
|
nuclear spin quantum number
|
1
|
|
one
|
|
1
|
729
|
|
hyperfine structure quantum
number
|
1
|
|
one
|
|
1
|
730
|
|
principle quantum number
|
1
|
|
one
|
|
1
|
731
|
|
magnetic quantum number
|
1
|
|
one
|
|
1
|
732
|
|
fine structure constant
|
1
|
|
one
|
|
1
|
733
|
|
mean life
|
1
|
|
second
|
|
s
|
734
|
|
half life
|
|
|
|
|
|
|
|
level width
|
1
|
|
joule
|
|
J
|
736
|
|
alpha disintegration energy
|
|
|
|
|
|
|
|
maximum beta partical energy
|
1
|
|
electronvolt
|
1,602 177 33 x 10-19 J
|
eV |
738
|
|
beta disintegration energy
|
|
|
|
|
|
|
|
internal conversion factor
|
1
|
|
one
|
|
1
|
740
|
|
activity
|
2
|
|
curie
|
3,7 x 10-10 Bq
(exactly)
|
Ci
|
741
|
| |
2S
|
|
millicurie
|
|
mCi |
742
|
| |
2S
|
|
microcurie
|
|
µCi
|
743
|
|
activity
|
2S
|
|
kilocurie
|
|
kCi
|
744
|
| |
1
|
|
becquerel
|
|
Bq |
745
|
| |
1M
|
|
gigabecquerel
|
|
GBq |
746
|
| |
1S
|
|
kilobecquerel
|
|
kBy |
747
|
| |
1S
|
|
megabecquerel
|
|
MBq
|
748
|
|
specific activity in a sample
|
2
|
|
curie per kilogram
|
|
Ci/kg |
749
|
| |
1
|
|
becquerel per kilogram
|
|
Bq/kg |
750
|
| |
1S
|
|
megabecquerel per kilogram
|
|
MBq/kg |
751
|
| |
1S
|
|
kilobecquerel per kilogram
|
|
kBq/kg
|
752
|
|
volumic activity,
|
1
|
|
becquerel per metre cubed
|
|
Bq/m³ |
753
|
|
activity concentration
|
|
|
|
|
|
|
|
decay constant,
|
1
|
|
reciprocal second
|
|
s-¹
|
755
|
|
disintegration constant
|
|
|
|
|
|
|