| Lood-209 | ||||
|---|---|---|---|---|
| Algemeen | ||||
| Element | lood (Pb) | |||
| Nuclide | 209Pb | |||
| Aantal protonen | 82 | |||
| Aantal neutronen | 127 | |||
| Nuclidische gegevens | ||||
| Nuclidenmassa | 208,98109012 u | |||
| Spin | 9/2+ | |||
| Bindingsenergie | 7,848647 MeV | |||
| Massaoverschot | −17,61444 MeV | |||
| Vervalgegevens | ||||
| Type verval | β−-verval | |||
| Halveringstijd | 3,25 uur | |||
| Vervalenergie | 644,02 keV | |||
| Vervalproduct | bismut-209 | |||
| Isotopen van lood | ||||
| ||||
Lood-209 of 209Pb is een onstabiele radioactieve isotoop van lood, een hoofdgroepmetaal. De isotoop komt van nature niet op Aarde voor.
Lood-209 kan ontstaan door radioactief verval van thallium-209, thallium-210, polonium-209 of radium-223.
![{\displaystyle {{\mathrm {^{~209}_{81}Tl} }{}\mathrel {\longrightarrow } {}{\mathrm {^{~209}_{82}Pb} }{}+{}{\mathrm {e^{\text{-}}} }{}+{}{\bar {\nu }}{\vphantom {A}}_{\smash[{t}]{e}}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/cc6bdcc8a16b0bc9f22292687760877f1355156c)
![{\displaystyle {{\mathrm {^{~209}_{84}Po} }{}\mathrel {\longrightarrow } {}{\mathrm {^{~209}_{83}Bi} }{}+{}{\mathrm {e^{+}} }{}+{}{\mathrm {\nu } }{\vphantom {A}}_{\smash[{t}]{e}}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/857a6471570ddaa03416eb5daf13433d3637ffae)
![{\displaystyle {{\mathrm {^{~209}_{83}Bi} }{}\mathrel {\longrightarrow } {}{\mathrm {^{~209}_{82}Pb} }{}+{}{\mathrm {e^{+}} }{}+{}{\mathrm {\nu } }{\vphantom {A}}_{\smash[{t}]{e}}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/8b941ea0cc2c53d1e4a267f8417e0760af5162bc)
![{\displaystyle {{\mathrm {^{~209}_{82}Pb} }{}\mathrel {\longrightarrow } {}{\mathrm {^{~209}_{83}Bi} }{}+{}{\mathrm {e^{\text{-}}} }{}+{}{\bar {\nu }}{\vphantom {A}}_{\smash[{t}]{e}}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/ac7825e97f98f47d54c6f75bfc6847452da7523d)
