Quantity |
Level
Cat. |
Use
Id. |
Name |
Convesion factors to SI units (1 unit equals)
|
Represen.
Symbol |
Cross
ref. |
|
| Nuclear Reactions and
Ionizing Radiations |
|
reaction energy
|
1
|
|
joule
|
|
J
|
757
|
|
resonance energy
|
1
|
|
electronvolt
|
1,602 177 33 x 10-19 J
|
eV |
758
|
|
average energy loss per ion pair
formed, (average energy loss per elementary charge of the same sign produced)
|
2
|
X
|
erg
|
10-7 J (exactly)
|
erg
|
759
|
|
cross-section
|
1
|
|
square metre
|
|
m²
|
760
|
|
total cross-section
|
1
|
|
barn
|
10-28 m² (exactly)
|
b
|
761
|
|
angular cross-section
|
1
|
|
square metre per steradian
|
|
m²/sr
|
762
|
| |
1
|
|
barn per sterdian
|
|
b/sr
|
763
|
|
spectral cross-section
|
1
|
|
square metre per joule
|
|
m²/J
|
764
|
| |
1
|
|
barn per electron volt
|
6,241 46 x 10-10 m²/J
|
b/eV |
765
|
| |
2
|
|
square centimetre per erg
|
10³ m²/J (exactly)
|
cm²/erg
|
766
|
spectral angular
cross-section
|
1
|
|
square metre per steradian joule
|
|
m²/(sr.J)
|
767
|
| |
1
|
|
barn per steradian electron
volt,
|
6,241 46 x 10-10 m²/(sr.J)
|
b/(sr.eV) |
768
|
| |
2
|
|
square centimetre per steradian
erg
|
10³ m²/(sr.J)
(exactly)
|
cm²/(sr.erg)
|
769
|
macroscopic cross-section,
volumic cross-section,
volumic total cross-section,
macroscopic total cross-section
|
1
|
|
reciprocal metre
|
|
m-¹
|
770
|
|
particle fluence
|
1
|
|
reciprocal square metre
|
|
m-²
|
771
|
particle fluence rate, (partical
flux density)
neutron fluence rate, (neutron flux density)
current density of particles
|
1
|
|
reciprocal metre squared
reciprocal second
|
|
m-² /s
|
772
|
|
energy fluence
|
1
|
|
joule per square metre
|
|
J/m²
|
774
|
|
energy fluence rate, (energy
flux density)
|
1
|
|
watt per square metre
|
|
W/m²
|
775
|
| |
2
|
X
|
erg per square centimetre second
|
10-³ W/m² (exactly)
|
erg/(cm².s)
|
776
|
|
linear attenuation coefficient
|
1
|
|
reciprocal metre
|
|
m-1
|
777
|
|
mass attenuation coefficient
|
1
|
|
square metre per kilogram
|
|
m²/kg
|
778
|
|
molar attenuation coefficient
|
1
|
|
square metre per mole
|
|
m²/mol
|
779
|
|
atomic attenuation coefficient,
|
1
|
|
square metre
|
|
m²
|
780
|
|
slowing down area
|
1
|
|
square metre
|
|
m2 |
781
|
|
diffusion area
|
|
|
|
|
|
|
|
migration area
|
|
|
|
|
|
|
|
half-thickness,
|
1
|
|
metre
|
|
m
|
784
|
|
half-value thickness
|
|
|
|
|
|
|
|
mean linear range
|
1
|
|
metre
|
|
m |
786
|
|
mean free path
|
|
|
|
|
|
|
|
slowing-down length
|
1
|
|
metre
|
|
m |
788
|
|
diffusion length
|
|
|
|
|
|
|
|
migration length
|
|
|
|
|
|
|
|
neutron yield per fission
|
1
|
|
one
|
|
1
|
791
|
|
neutron yield per absorption
|
|
|
|
|
|
|
|
fast fission factor
|
1
|
|
one
|
|
1
|
793
|
|
thermal utilization factor
|
1
|
|
one
|
|
1
|
794
|
|
non leakage probability
|
1
|
|
one
|
|
1 |
795
|
|
multiplication factor
|
1
|
|
one
|
|
1
|
796
|
|
infinite medium multiplication
factor
|
|
|
|
|
|
|
|
effective multiplication factor
|
|
|
|
|
|
|
|
diffusion coefficient for
neutron fluence rate, (diffusion coefficient for neutron flux density)
|
1
|
|
metre
|
|
m |
799
|
|
total linear stopping power
|
1
|
|
joule per metre
|
|
J/m
|
800
|
| |
1
|
|
electronvolt per metre
|
1,602 177 33 x 10-19 J/m
|
eV/m
|
801
|
| |
2
|
X
|
erg per centimetre
|
10-5 J/m
(exactly)
|
erg/cm
|
802
|
|
total atomic stopping power
|
1
|
|
joule square metre
|
|
J.m²
|
803
|
| |
1
|
|
electronvolt square metre
|
1,602 177 33 x 10-19 J.m²
|
eV.m² |
804
|
| |
2
|
X
|
erg square centimetre
|
10- ¹¹ J.m²
(exactly)
|
erg.cm²
|
805
|
|
total mass stopping power
|
1
|
|
joule square metre per kilogram
|
|
J.m²/kg
|
806
|
| |
1
|
|
electronvolt square metre per
kilogram
|
1,6021892x10-19J.m²/kg
|
eV.m²/kg |
807
|
| |
2
|
X
|
erg square centimetre per gram
|
10-8J.m²/kg
(exactly)
|
erg.cm²/g
|
808
|
|
mean mass range
|
1
|
|
kilogram per square metre
|
|
kg/m²
|
809
|
|
linear ionization by a particle
|
1
|
|
reciprocal metre
|
|
m-¹
|
810
|
|
total ionization by a particle
|
1
|
|
|
|
l
|
|
|
mobility
|
1
|
|
square metre per volt second
|
|
m²/(V.s)
|
812
|
|
ion number density
|
1
|
|
reciprocal cubic metre
|
|
m-³
|
813
|
|
ion density
|
|
|
|
|
|
|
|
neutron number density
|
|
|
|
|
|
|
|
recombination coefficient
|
1
|
|
cubic metre per second
|
|
m³/s
|
816
|
|
neutron speed
|
1
|
|
metre per second
|
|
m/s
|
817
|
|
diffusion coefficient,
|
1
|
|
square metre per second
|
|
m²/s
|
818
|
|
diffusion coefficient for
neutron number density
|
|
|
|
|
|
|
|
neutron source density
|
1
|
|
reciprocal second per cubic
metre
|
|
s-¹/m³
|
820
|
|
slowing down density
|
1
|
|
reciprocal cubic metre per
second
|
|
m-3/s
|
821
|
|
resonance escape probability
|
1
|
|
one
|
|
1
|
822
|
|
lethargy
|
1
|
|
one
|
|
1
|
823
|
|
average logarithmic energy
decrement
|
1
|
|
one
|
|
1
|
824
|
|
reactivity
|
1
|
|
one
|
|
1
|
825
|
|
reactor time constant
|
1
|
|
second
|
|
s
|
826
|
|
activity
|
1
|
|
becquerel
|
|
Bq
|
827
|
| |
2
|
|
curie
|
3,7 x 1010 Bq
(exactly)
|
Ci
|
828
|
|
energy imparted
|
1
|
|
joule
|
|
J
|
829
|
|
mean energy imparted
|
1
|
|
|
|
|
|
|
specific energy imparted, massic
energy imparted
|
1
|
|
gray
|
|
Gy
|
831
|
| |
1S
|
|
milligray
|
|
mGy
|
832
|
|
absorbed dose
|
2
|
|
rad
|
10-2 Gy
|
rad
|
833
|
|
kerma
|
2
|
X
|
erg per gram
|
10-4 J/kg (exactly)
|
erg/g
|
834
|
|
dose equivalent
|
1
|
|
sievert
|
|
Sv
|
835
|
| |
1S
|
|
millisievert
|
|
mSv |
836
|
| |
2
|
|
rem
|
10- ² Sv
|
rem
|
837
|
|
absorbed dose rate
|
1
|
|
gray per second
|
|
Gy/s
|
838
|
|
kerma rate
|
2
|
X
|
erg per gram second
|
10- 4 W/kg (exactly)
|
erg/g.s
|
839
|
|
linear energy transfer
|
1
|
|
joule per metre
|
|
J/m
|
840
|
| |
1
|
|
electronvolt per metre
|
1,602 177 33 x 10-19 J/m
|
eV/m |
841
|
| |
2
|
X
|
erg per centimetre
|
10-5 J/m
(exactly)
|
erg/cm
|
842
|
|
mass energy transfer coefficient
|
1
|
|
square metre per kilogram
|
|
m²/kg
|
843
|
|
exposure
|
1
|
|
coulomb per kilogram
|
|
C/kg
|
844
|
| |
1S
|
|
millicoulomb per kilogram
|
|
mC/kg |
845
|
| |
2
|
|
röntgen
|
2,58x10-4 C/kg
(exactly)
|
R |
846
|
| |
2
|
|
milliröntgen
|
|
mR |
847
|
| |
2
|
|
kiloröntgen
|
|
kR
|
848
|
|
exposure rate
|
1
|
|
coulomb per kilogram second
|
|
C/(kg.s)
|
849
|
| |
2
|
|
röntgen per second
|
2,58x10-4 C/(kg.s)
|
R/s
|
850
|