Table of Contents
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Permeability of Vacuum
Speed of Light in Vacuum
Permitivity of Vacuum
Fine Structure Constant, µ0ce2/2h
Elementary Charge
Avogadro's Constant
Atomic Mass Unit
Electron Rest Mass
Neutron Rest Mass
Magnetic Flux Quantum
Josephson Frequency-Voltage Ratio
Quantum of Circulation
Proton Moment in Nuclear Magnetons
Proton Gyromagnetic Ratio
Diamagnetic Shielding Factor, Spherical H
Molar Mass Constant
Molar Volume, Ideal Gas (T
Boltzman Constant
Stefan-Boltzman Constant
First Radiation Constant
Second Radiation Constant
Gravitation Constant
Data (abbreviated to 4 decimal places) from CODATA Bulletin No. 11, ICSU CODATA Central Office, 19 Westendstrasse,
6 Frankfurt/Main, Germany. Copies of this bulletin are available from this office.
B-2
Lake Shore Model 642 Electromagnet Power Supply User's Manual
Table B-2. Recommended SI Values for Physical Constants
Quantity
Plank's Constant
Proton Rest Mass
Rydberg Constant
Bohr Magneton
O Sample
2
= 273.15K, p
= 1 atm)
0
0
Symbol
µ
0
c
2
-1
= (µ
c
)
0
0
-1
e
h
h = h/2
N
A
-3
-1
1 u = 10
kg mol
/N
A
m
e
m
p
m
n
= h/2e
4.1357 × 10
h/e
2e/h
h/2m
3.6369 × 10
e
h/m
7.2739 × 10
e
R
µ
/µ
p
N
µ
= eh/2m
B
e
p
1 + (H
O)
2
R
V
= RT
/p
m
0
0
k = R/N
A
2
4
3
2
5.6703 × 10
= (
/60) k
/h
c
2
c
= 2 hc
1
c
= hc/k
2
G
6.6720 × 10
Value (SI units)
-7
-1
4 × 10
H m
8
-1
2.9979 × 10
m s
-12
-1
8.8542 × 10
F m
0.0073
137.0360
-19
1.6022 × 10
C
-34
-1
6.6262 × 10
J Hz
-34
1.0546 × 10
J s
23
-1
6.0220 × 10
mol
-27
1.6605 × 10
kg
-30
0.9109 × 10
kg
-4
5.4858 × 10
u
-27
1.6726 × 10
kg
1.0073 u
-27
1.6749 × 10
kg
1.0087 u
-15
2.0679 × 10
Wb
-15
-1
-1
J Hz
C
-1
483.5939 THz V
-4
-1
-1
J Hz
kg
-4
-1
-1
J Hz
C
7
-1
1.0974 × 10
m
2.7928
-24
-1
9.2741 × 10
J T
8
-1
-1
2.6752 × 10
s
T
1.0000
-1
-1
8.3144 J mol
K
3
-1
0,0224 m
mol
-23
-1
1.3807 × 10
J K
-8
-2
-4
W m
K
-16
-2
3.7418 × 10
W m
0.0144 mK
-11
2
-2
N m
kg
Units for Magnetic Properties
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