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atomic and nucleus

Name

Symbol

Derivation

Value

Unit

Info

1

Bohr radius

a0

4pe0ħ2/mee2

0.5291772083(19) x 10-10

m

-

2

classical electron radius

re

a2a0

2.817940285(31) x 10-15

m

-

3

electron charge to mass quotient

-

-e/me

-1.758820174(71) x 1011

Ckg-1

-

4

electron magnetic moment

me

-

-928.476362(87) x 10-26

JT-1

-

5

electron magnetic moment
(to Bohr magneton)

me/mB

-

-1.0011596521869(41)

-

-

6

electron magnetic moment
(to nuclear magneton)

me/mN

-

-1838.2819660(39)

-

-

7

electron magnetic moment anomaly

ae

|me|/mB - 1

1.1596521869(41) x 10-3

-

-

8

electron mass

me

-

9.10938188(72) x 10-31

kg

-

9

electron mass energy equivalent

-

mec2

8.18710414(64) x 10-14

J

-

10

Fermi coupling constant

-

GF/(ħc)3

1.16639 x 10-5

GeV-2

-

11

fine structure constant

a

e2/4pe0ħc

7.297352533(27) x 10-3

-

-

12

Hartree energy

Eh

e2/4pe0a0

4.35974381(34) x 10-18

J

-

13

inverse fine-structure constant

a-1

-

137.03599976(50)

-

-

14

quantum of circulation

-

h/2me

3.636947516(27) x 10-4

m2s-1

-

15

Rydberg constant

R

a 2mec/2h

10973731.568549(83)

m-1

-

16

Thomson cross section

se

(8p/3)re2

0.665245854(15) x 10-28

m2

-


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