Radionuclides generated by interaction of cosmic radiation with the atomic nuclei of the atmosphere or with extraterrestrial matter coming down to earth as meteors or meteorites.

Nuclide
Half-life
Nuclide
Half-life
Nuclide
Half-life
H-3
12,323 a
Si-32
172 a
Mn-53
  3,7·106 a
Be-7
53,3 d
P-32
14,3 d
Mn-54
       312 d
Be-10
1,6·106 a
S-35
87,5 d
Fe-55
      2,73 a
C-14
5730 a
S-38
2,8 h
Fe-60
  1,5·106 a
Na-22
2,60 a
Cl-36
3,0·105 a
Co-60
      5,27 a
Na-24
15 h
Ar-39
269 a
Ni-59
  7,5·104 a
Al-26
7,2·105 a
Ar-42
33 a
Ni-63
       100 a
Mg-28
20,9 h
Ca-41
1,0·105 a
Kr-85
      10,7 a
Si-31
2,6 h
Ti-44
60,4 a
I-129
  1,6 107 a

Cosmogenic radionuclides