Are you looking to find what kind of elements are most common in fission byproducts? Have you realized that https://www-nds.iaea.org/wimsd/fpyield.htm is missing a gazillion isotopes? Look no further, as this project hopes to solve that question.
The chain yield of an isotope (or element) is its fission yield after the fission byproducts have had a certain amount of time to decay. This figure can be especially useful for determining the composition of spent nuclear fuel, as might be required for research for a video game or an article. This project can be used to (approximately) calculate these chain yields and output them for various common fission reactions.
If you don't see your preferred data in the tables below, you will have to build this yourself. You can download this git repository and run the below command (I think):
javac -classpath . src/main/java/Main.java
Alternatively, you could build it using an available Java IDE.
Once you get your jar file from the build output, you can run it like this:
java -jar (the jar here) (isotope name, like (and defaulting to) "235u") (measurement year (defaulting to 2))
The isotopes you can currently use are (according to https://www-nds.iaea.org/relnsd/vcharthtml/api_v0_guide.html): 232th or 233u or 235u or 238u or 237np or 239pu or 241pu or 241am. Bug them if you want more, but politely, please.
It might prompt you occasionally to give the symbol of certain elements (although this is pretty rare now). Make sure you give the right symbol for the element! You may also see a log for a decay mode not being implemented, if you choose a particularly exotic fissionable isotope to start with. If so, just send an issue here.
It may take up to a few minutes to get the results on the first time, as at least a hundred CSV files will be downloaded from the nds.iaea.org API. Afterwards, it will output a table of fission yields into the console. These yields will add up to just under 2, which is fine, since you get, well, two atoms per fission, and the extremely rare fission byproducts have been filtered out.
These have all been calculated using this utility.
| Element Symbol | Fission Yield (2 Years) | Fission Yield (31 Years) |
|---|---|---|
| H | 0.000097 | 0.000019 |
| He | 0.001711 | 0.001789 |
| Se | 0.005055 | 0.005055 |
| Br | 0.001840 | 0.001840 |
| Kr | 0.047378 | 0.038116 |
| Rb | 0.027455 | 0.036717 |
| Sr | 0.090214 | 0.062869 |
| Y | 0.046984 | 0.046969 |
| Zr | 0.312708 | 0.340043 |
| Nb | 0.000029 | 0.000000 |
| Mo | 0.244724 | 0.244777 |
| Tc | 0.061318 | 0.061312 |
| Ru | 0.114259 | 0.113209 |
| Rh | 0.031015 | 0.031015 |
| Pd | 0.014444 | 0.015494 |
| Ag | 0.000170 | 0.000170 |
| Cd | 0.000224 | 0.000224 |
| Sn | 0.000604 | 0.000604 |
| Sb | 0.000000 | 0.000000 |
| Te | 0.020873 | 0.020873 |
| I | 0.008110 | 0.008109 |
| Xe | 0.214957 | 0.214957 |
| Cs | 0.190205 | 0.161984 |
| Ba | 0.069914 | 0.098134 |
| La | 0.063342 | 0.063342 |
| Ce | 0.130974 | 0.121733 |
| Pr | 0.058469 | 0.058469 |
| Nd | 0.197249 | 0.206490 |
| Pm | 0.013308 | 0.000006 |
| Sm | 0.026693 | 0.039170 |
| Eu | 0.001621 | 0.002299 |
| Gd | 0.000050 | 0.000197 |
| Element Symbol | Fission Yield (2 Years) | Fission Yield (31 Years) |
|---|---|---|
| H | 0.000127 | 0.000025 |
| He | 0.002205 | 0.002307 |
| Se | 0.003918 | 0.003918 |
| Br | 0.001723 | 0.001723 |
| Kr | 0.020387 | 0.016145 |
| Rb | 0.010310 | 0.014552 |
| Sr | 0.032207 | 0.022598 |
| Y | 0.016783 | 0.016777 |
| Zr | 0.187172 | 0.196769 |
| Nb | 0.000022 | 0.000000 |
| Mo | 0.229152 | 0.229192 |
| Tc | 0.061856 | 0.061850 |
| Ru | 0.193911 | 0.183185 |
| Rh | 0.069455 | 0.069455 |
| Pd | 0.146052 | 0.156777 |
| Ag | 0.016594 | 0.016594 |
| Cd | 0.005497 | 0.005497 |
| In | 0.000247 | 0.000247 |
| Sn | 0.005691 | 0.005676 |
| Sb | 0.001804 | 0.001151 |
| Te | 0.037088 | 0.037756 |
| I | 0.018562 | 0.018562 |
| Xe | 0.227601 | 0.227601 |
| Cs | 0.206410 | 0.175809 |
| Ba | 0.064938 | 0.095538 |
| La | 0.059650 | 0.059650 |
| Ce | 0.109386 | 0.103039 |
| Pr | 0.052022 | 0.052021 |
| Nd | 0.156851 | 0.163199 |
| Pm | 0.012177 | 0.000006 |
| Sm | 0.036614 | 0.047257 |
| Eu | 0.005172 | 0.005429 |
| Gd | 0.002512 | 0.003783 |
| Tb | 0.000116 | 0.000116 |
| Element Symbol | Fission Yield (2 Years) | Fission Yield (31 Years) |
|---|---|---|
| H | 0.000126 | 0.000025 |
| He | 0.001875 | 0.001976 |
| Se | 0.001359 | 0.001359 |
| Br | 0.000474 | 0.000474 |
| Kr | 0.015817 | 0.012791 |
| Rb | 0.008344 | 0.011370 |
| Sr | 0.024435 | 0.017281 |
| Y | 0.012203 | 0.012198 |
| Zr | 0.145526 | 0.152670 |
| Nb | 0.000017 | 0.000000 |
| Mo | 0.191712 | 0.191744 |
| Tc | 0.056141 | 0.056136 |
| Ru | 0.204132 | 0.188905 |
| Rh | 0.065330 | 0.065330 |
| Pd | 0.227287 | 0.242513 |
| Ag | 0.029637 | 0.029637 |
| Cd | 0.010464 | 0.010464 |
| In | 0.001130 | 0.001130 |
| Sn | 0.007716 | 0.007691 |
| Sb | 0.003548 | 0.002104 |
| Te | 0.028653 | 0.030122 |
| I | 0.018305 | 0.018305 |
| Xe | 0.220748 | 0.220748 |
| Cs | 0.196190 | 0.167065 |
| Ba | 0.067017 | 0.096141 |
| La | 0.059414 | 0.059414 |
| Ce | 0.111943 | 0.104989 |
| Pr | 0.048944 | 0.048944 |
| Nd | 0.166104 | 0.173059 |
| Pm | 0.013426 | 0.000006 |
| Sm | 0.042398 | 0.054139 |
| Eu | 0.005309 | 0.005707 |
| Gd | 0.006158 | 0.007438 |
| Tb | 0.001117 | 0.001117 |
| Dy | 0.001230 | 0.001230 |