User:JWB
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American expansion and division period
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Nuclear
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Reactor technology
Types
Integral Fast Reactor
UHTREX
Components
Nuclear reactor coolant Neutron moderator
Fission products
Fission product
Fission products (by element)
Fission product yield
Fluoride volatility
Nuclide | t1⁄2
|
Yield | Q[a 1] | βγ
|
---|---|---|---|---|
( Ma )
|
(%)[a 2] | ( keV )
|
||
99Tc | 0.211 | 6.1385 | 294 | β |
126Sn
|
0.230 | 0.1084 | 4050[a 3] | βγ |
79Se | 0.327 | 0.0447 | 151 | β |
135Cs
|
1.33 | 6.9110[a 4] | 269 | β |
93Zr
|
1.53 | 5.4575 | 91 | βγ |
107Pd
|
6.5 | 1.2499 | 33 | β |
129I | 15.7 | 0.8410 | 194 | βγ |
t½ )
(year |
Yield (%) |
keV )
|
βγ
| |
---|---|---|---|---|
155Eu
|
4.76 | 0.0803 | 252 | βγ |
85Kr | 10.76 | 0.2180 | 687 | βγ |
113mCd
|
14.1 | 0.0008 | 316 | β |
90Sr | 28.9 | 4.505 | 2826 | β |
137Cs | 30.23 | 6.337 | 1176 | βγ |
121mSn
|
43.9 | 0.00005 | 390 | βγ |
151Sm
|
88.8 | 0.5314 | 77 | β |
Actinides[1] by decay chain | Half-life range (a) |
|||||||
---|---|---|---|---|---|---|---|---|
4n
|
4n + 1
|
4n + 2
|
4n + 3
|
4.5–7% | 0.04–1.25% | <0.001% | ||
228 Ra№
|
4–6 a
|
155 Euþ
|
||||||
244 Cmƒ
|
241Puƒ | 250 Cf
|
227 Ac№
|
10–29 a
|
90Sr | 85Kr | 113m Cdþ
| |
232Uƒ | 238Puƒ | 243 Cmƒ
|
29–97 a
|
137 Cs
|
151 Smþ
|
121m Sn
| ||
248Bk[3]
|
249 Cfƒ
|
242m Amƒ
|
141–351 a |
No fission products have a half-life | ||||
241Amƒ | 251Cfƒ[4]
|
430–900 a | ||||||
226Ra№ | 247 Bk
|
1.3–1.6 ka | ||||||
240Pu | 229 Th
|
246 Cmƒ
|
243 Amƒ
|
4.7–7.4 ka | ||||
245 Cmƒ
|
250 Cm
|
8.3–8.5 ka | ||||||
239Puƒ | 24.1 ka | |||||||
230 Th№
|
231 Pa№
|
32–76 ka | ||||||
236 Npƒ
|
233Uƒ | 234U№ | 150–250 ka | 99Tc₡ | 126 Sn
| |||
248 Cm
|
242Pu | 327–375 ka | 79Se₡ | |||||
1.53 Ma | 93 Zr
| |||||||
237 Npƒ
|
2.1–6.5 Ma | 135 Cs₡
|
107 Pd
| |||||
236U | 247 Cmƒ
|
15–24 Ma | 129I₡ | |||||
244Pu | 80 Ma |
... nor beyond 15.7 Ma[5] | ||||||
232Th№ | 238U№ | 235Uƒ№ | 0.7–14.1 Ga | |||||
|
Actinides
237Np | ||||||||||||||
↑ | ||||||||||||||
231U | ← | 232U | ↔ | 233U | ↔ | 234U | ↔ | 235U | ↔ | 236U | → | 237U | ||
↓ | ↑ | ↑ | ↑ | |||||||||||
231Pa | → | 232Pa | ← | 233Pa | → | 234Pa | ||||||||
↑ | ↑ | |||||||||||||
230Th | → | 231Th | ← | 232Th | → | 233Th | ||||||||
|
Weapons-grade
Isotopes
Table of nuclides Isotope Tritium
- ^ 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.
- thermal neutron fission of uranium-235, e.g. in a typical nuclear reactor.
- .
"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 Bk248 with a half-life greater than 9 [years]. No growth of Cf248 was detected, and a lower limit for the β− half-life can be set at about 104 [years]. No alpha activity attributable to the new isomer has been detected; the alpha half-life is probably greater than 300 [years]." - sea of instability".
- ^ Excluding those "classically stable" nuclides with half-lives significantly in excess of 232Th; e.g., while 113mCd has a half-life of only fourteen years, that of 113Cd is eight quadrillion years.