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Radioactive Half-lifes

Isotope Half-life Type of Decay
  
Isotope Half-life Type of Decay

oxygen-19

29.1 s

Beta

cesium-129

32.1 h

electron capture

fluorine-20

11.6 s

Beta

promethium-149 

53.1 h 

Beta

silicon-26

2.1 s

Positron

gadolinium-145

25 m 

Positron

zinc-71

2.4 m

Beta

osmium-183 

12.0 h

electron capture

lead-212 

10.6 h 

Beta

plutonium-236 

2.85 y 

Alpha

selenium-84

3.2 m

Beta

uranium-227  

1.3 m

Alpha

polonium-210

138 d

Alpha

scandium-49

57.5 m

Beta

chlorine-39

55.5 m

Beta

hydrogen-3 

12.3 y 

Beta