In that all pages belong to the whole project, any user may edit this one. But it's generally more helpful (and polite) to discuss the proposed change on its talk page first.
The page now at fissile material has been greatly improved since I began contributing at talk:fissile.
But still room for improvement.
Material on the odd/even rule long used by nuclear engineers has been published by Yigal Ronen who may even qualify for an article himself. See
- https://www.tandfonline.com/doi/abs/10.13182/NSE06-A2588
- https://www.semanticscholar.org/paper/A-Rule-for-Determining-Fissile-Isotopes-Ronen/f0019eefe188ed44c86042c599d929950013bf16
https://www.sciencedirect.com/science/article/pii/S0306454910002586 refers to the Fissile Rule.