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{| border=0 style="float:right; border:1px solid #aaa; margin-left:10px; font-size:95%; text-align:center;"
! colspan="9" style="font-size:105%;" | ((navbar-header|Actinides and fission products by half-life |Template:Actinides vs fission products|mini=1))
|- style="background:#d8d8d8;"
! colspan="4" | [[Actinide]]s<ref>Plus radium (element 88). While actually a sub-actinide, it immediately precedes actinium (89) and follows a three-element gap of instability after [[polonium]] (84) where no nuclides have half-lives of at least four years (the longest-lived nuclide in the gap is [[radon-222]] with a half life of less than four ''days''). Radium's longest lived isotope, at 1,600 years, thus merits the element's inclusion here.</ref> by [[decay chain]]
! rowspan="2" | [[Half-life]] <br />range ([[year|a]])
! colspan="4" style="font-size:90%;" | [[Fission product]]s of [[Uranium-235|<sup>235</sup>U]] by [[fission product yield|yield]]<ref>Specifically from [[thermal neutron]] fission of uranium-235, e.g. in a typical [[nuclear reactor]].</ref>
|- style="background:#e8e8e8; font-size:80%;"
! [[Thorium series|4''n'']]
! [[Neptunium series|4''n'' + 1]]
! [[Uranium series|4''n'' + 2]]
! [[Actinium series|4''n'' + 3]]
! 4.5–7%
! style="padding:3px 0;" | 0.04–1.25%
! <0.001%
|-
| ((Iso1|[[Radium-228|228]]|Ra<sup>№</sup>|0))
|
|
|
! style="background:#e8e8e8; text-align:right;" | [[Medium-lived fission product|4–6&nbsp;a]]
|
| ((Iso1|[[Europium-155|155]]|Eu<sup>þ</sup>|0))
|
|-
| ((Iso1|[[Curium-244|244]]|Cm<sup>ƒ</sup>|1))
| ((Iso1|[[Plutonium-241|241]]|Pu<sup>ƒ</sup>|1))
| ((Iso1|[[Californium-250|250]]|Cf|1))
| ((Iso1|[[Actinium-227|227]]|Ac<sup>№</sup>|1))
! style="background:#e8e8e8; text-align:right;" | [[Medium-lived fission product|10–29&nbsp;a]]
| ((Iso1|[[Strontium-90|90]]|Sr|1))
| ((Iso1|[[Krypton-85|85]]|Kr|1))
| ((Iso1|[[Cadmium-113m|113m]]|Cd<sup>þ</sup>|1))
|-
| ((Iso1|[[Uranium-232|232]]|U<sup>ƒ</sup>|1))
|
| ((Iso1|[[Plutonium-238|238]]|Pu<sup>ƒ</sup>|1))
| ((Iso1|[[Curium-243|243]]|Cm<sup>ƒ</sup>|1))
! style="background:#e8e8e8; text-align:right;" | [[Medium-lived fission product|29–97&nbsp;a]]
| ((Iso1|[[Cs-137|137]]|Cs|1))
| ((Iso1|[[Samarium-151|151]]|Sm<sup>þ</sup>|1))
| ((Iso1|[[Tin-121m|121m]]|Sn|1))
|-
| ((Iso1|[[Berkelium-248|248]]|Bk|2))<ref>((Cite journal 
 | last1 = Milsted | first1 = J.
 | last2 = Friedman | first2 = A. M.
 | last3 = Stevens | first3 = C. M.
 | doi = 10.1016/0029-5582(65)90719-4
 | title = The alpha half-life of berkelium-247; a new long-lived isomer of berkelium-248
 | journal = Nuclear Physics
 | volume = 71
 | issue = 2
 | pages = 299
 | year = 1965
 | bibcode = 1965NucPh..71..299M
))<br />"The isotopic analyses disclosed a species of mass 248 in constant abundance in three samples analysed over a period of about 10 months. This was ascribed to an isomer of Bk<sup>248</sup> with a half-life greater than 9 [years]. No growth of Cf<sup>248</sup> was detected, and a lower limit for the β<sup>−</sup> half-life can be set at about 10<sup>4</sup> [years]. No alpha activity attributable to the new isomer has been detected; the alpha half-life is probably greater than 300 [years]."</ref>
| ((Iso1|[[Californium-249|249]]|Cf<sup>ƒ</sup>|2))
| ((Iso1|[[Americium-242m|242m]]|Am<sup>ƒ</sup>|2))
|
! style="background:#e8e8e8; text-align:right;" | 141–351&nbsp;a
| rowspan="7" colspan="3" style="width:0; background-color:#ffffdd; border:1px dashed; text-align:center;" |
No fission products have a ((nobr|half-life)) in the range of 100&nbsp;a–210&nbsp;ka ...
|-
|
| ((Iso1|[[Americium-241|241]]|Am<sup>ƒ</sup>|2))
|
| ((Iso1|[[Californium-251|251]]|Cf<sup>ƒ</sup>|2))<ref>This is the heaviest nuclide with a half-life of at least four years before the "[[sea of instability]]".</ref>
! style="background:#e8e8e8; text-align:right;" | 430–900&nbsp;a
|-
|
|
| ((Iso1|[[Radium-226|226]]|Ra<sup>№</sup>|3))
| ((Iso1|[[Berkelium-247|247]]|Bk|3))
! style="background:#e8e8e8; text-align:right;" | 1.3–1.6&nbsp;ka
|-
| ((Iso1|[[Plutonium-240|240]]|Pu|3))
| ((Iso1|[[Thorium-229|229]]|Th|3))
| ((Iso1|[[Curium-246|246]]|Cm<sup>ƒ</sup>|3))
| ((Iso1|[[Americium-243|243]]|Am<sup>ƒ</sup>|3))
! style="background:#e8e8e8; text-align:right;" | 4.7–7.4&nbsp;ka
|-
|
| ((Iso1|[[Curium-245|245]]|Cm<sup>ƒ</sup>|3))
| ((Iso1|[[Curium-250|250]]|Cm|3))
|
! style="background:#e8e8e8; text-align:right;" | 8.3–8.5&nbsp;ka
|-
|
|
|
| ((Iso1|[[Plutonium-239|239]]|Pu<sup>ƒ</sup>|4))
! style="background:#e8e8e8; text-align:right;" | 24.1&nbsp;ka
|-
|
|
| ((Iso1|[[Thorium-230|230]]|Th<sup>№</sup>|4))
| ((Iso1|[[Protactinium-231|231]]|Pa<sup>№</sup>|4))
! style="background:#e8e8e8; text-align:right;" | 32–76&nbsp;ka
|-
| ((Iso1|[[Neptunium-236|236]]|Np<sup>ƒ</sup>|5))
| ((Iso1|[[Uranium-233|233]]|U<sup>ƒ</sup>|5))
| ((Iso1|[[Uranium-234|234]]|U<sup>№</sup>|5))
|
! class="nowrap" style="background:#e8e8e8; text-align:right;" | [[Long-lived fission product|150–250&nbsp;ka]]
| ((Iso1|[[Technetium-99|99]]|Tc<sup>₡</sup>|5))
| ((Iso1|[[Tin-126|126]]|Sn|5))
|-
| ((Iso1|[[Curium-248|248]]|Cm|5))
|
| ((Iso1|[[Plutonium-242|242]]|Pu|5))
|
! style="background:#e8e8e8; text-align:right;" | [[Long-lived fission product|327–375&nbsp;ka]]
|
| ((Iso1|[[Selenium-79|79]]|Se<sup>₡</sup>|5))
|-
|
|
|
|
! style="background:#e8e8e8; text-align:right;" | [[Long-lived fission product|1.53&nbsp;Ma]]
| ((Iso1|[[Zirconium-93|<span style="color:white;">93</span>]]|Zr|6))
|-
|
| ((Iso1|[[Neptunium-237|<span style="color:white;">237</span>]]|Np<sup>ƒ</sup>|6))
|
|
! style="background:#e8e8e8; text-align:right;" | [[Long-lived fission product|2.1–6.5&nbsp;Ma]]
| ((Iso1|[[Cs-135|<span style="color:white;">135</span>]]|Cs<sup>₡</sup>|6))
| ((Iso1|[[Palladium-107|<span style="color:white;">107</span>]]|Pd|6))
|-
| ((Iso1|[[Uranium-236|<span style="color:white;">236</span>]]|U|7))
|
|
| ((Iso1|[[Curium-247|<span style="color:white;">247</span>]]|Cm<sup>ƒ</sup>|7))
! style="background:#e8e8e8; text-align:right;" | [[Long-lived fission product|15–24&nbsp;Ma]]
|
| ((Iso1|[[Iodine-129|<span style="color:white;">129</span>]]|I<sup>₡</sup>|7))
|-
| ((Iso1|[[Plutonium-244|<span style="color:white;">244</span>]]|Pu|7))
|
|
|
! style="background:#e8e8e8; text-align:right;" | 80&nbsp;Ma
| colspan="3" rowspan="2" style="width:0; background-color:#ffffdd; border:1px dashed; text-align:center;" |
... nor beyond 15.7&nbsp;Ma<ref>Excluding those "[[primordial nuclide|classically stable]]" nuclides with half-lives significantly in excess of <sup>232</sup>Th; e.g., while <sup>113m</sup>Cd has a half-life of only fourteen years, that of <sup>113</sup>Cd is nearly eight [[orders of magnitude (numbers)#1015|quadrillion]] years.</ref>
|-
| ((Iso1|[[Thorium-232|232]]|Th<sup>№</sup>|9))
|
| ((Iso1|[[Uranium-238|238]]|U<sup>№</sup>|9))
| ((Iso1|[[Uranium-235|235]]|U<sup>ƒ№</sup>|9))
! style="background:#e8e8e8; text-align:right;" | 0.7–14.1&nbsp;Ga
|-
| colspan=9 style="table-layout:fixed; width:100%; border-top:1px solid #aaa; background:#ececec; padding-left:1em; font-size:90%; text-align:left;" | ((ubli
 | ₡,&nbsp; has thermal [[neutron capture]] cross section in the range of 8–50 barns
 | ƒ,&nbsp; [[fissile]]
 | №,&nbsp; primarily a [[naturally occurring radioactive material]] (NORM)
 | þ,&nbsp; [[neutron poison]] (thermal neutron capture cross section greater than 3k barns)
))
|}<noinclude>
__NOTOC__
((Template reference list))
((documentation))
</noinclude>

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