Evidence
Imported NUBASE rows
The current ranking prefers measured NUBASE branches when available and falls back to the model stack elsewhere.
Select an isotope to see ranked decay pathways, sequential chains, and physics context — backed by NUBASE2020 data where available.
Evidence
Imported NUBASE rows
The current ranking prefers measured NUBASE branches when available and falls back to the model stack elsewhere.
Ranked modes
5
Every visible branch is ordered by the strongest evidence and predicted probability for this nucleus.
Primary path
Alpha
This top-ranked mechanism is the one most likely to drive the next visible transition.
U
Z=92 • N=143 • N/Z=1.554
Decay modes
5
5 ranked decay modes are visible in the workspace.
Isotope status
Unstable
Radioactive with experimentally observed or model-supported decay pathways.
Decay chain
10
10 sequential steps are available to inspect.
Primary decay
Alpha
This is the top-ranked decay path under the current evidence set.
Known decay mode with 100.0% branching ratio
Half-life
704 My
Daughter
Th-231
Known decay mode with 0.0% branching ratio
Half-life
1.01×10^10 Gy
Fissility
0.753
Known decay mode with 0.0% branching ratio
Half-life
8.80×10^10 Gy
Known imported decay mode with an approximate reported branching ratio of ~8e-10.
Half-life
704 My
Known decay mode with 0.0% branching ratio
Half-life
8.80×10^10 Gy