Decay Simulator: Cesium-112
General data
| Element name | Cesium |
|---|---|
| Chemical symbol | Cs |
| Atomic number Z | 55 |
| Isotope name (symbol) | Cesium-112 (Cs-112) |
| Neutron number N | 57 |
| Mass number A=Z+N | 112 |
Interactive radioactive decay simulation of Cesium-112: atom-by-atom decay, full decay chain, charts of nuclei count and activity.
| Half-life | 490 μs |
|---|
Radioactive decay series
- Cesium-112 490 μs
- Xenon-111 0.74 s
- Iodine-111 2.5 s · 89.6%
- Tellurium-111 26.2 s · 89.5%
- Antimony-111 74.9 s · 89.5%
- Tin-111 35.3 min · 89.5%
- Indium-111 2.8048 d · 89.5%
- Cadmium-111 stable · 89.5%
- Tellurium-107 3.6 ms · 10.4%
- Tin-103 7.0 s · 7.3%
- Indium-103 65 s · 7.2%
- Cadmium-103 7.50 min · 7.2%
- Silver-103 65.8 min · 7.2%
- Palladium-103 17.00 d · 7.2%
- Rhodium-103 stable · 7.2%
- Antimony-107 4.0 s · 3.2%
- Tin-107 2.90 min · 3.2%
- Indium-107 32.4 min · 3.2%
- Cadmium-107 6.52 h · 3.2%
- Silver-107 stable · 3.2%
- Cadmium-102 5.5 min · 0.087%
- Silver-102 12.9 min · 0.087%
- Palladium-102 stable · 0.087%
How to read the simulation
Grid: each pixel is one atom of the starting isotope. When an atom decays, the pixel takes the colour of the decay product - in decay series mode the product can decay further. The moment each atom decays is random, but the probability follows from the half-life, so after one T½ about half of the atoms remain, after two - about a quarter.
Chart N(t): what percentage of the sample atoms each nuclide makes up at a given moment. The line of the starting isotope falls (by half after each T½), the lines of stable products rise, and those of short-lived ones first rise, then fall.
Chart A(t): activity, i.e. the number of decays per second (becquerel, Bq). It depends on the number of atoms and on how fast they decay: for the same number of atoms, the shorter the T½, the higher the activity.
Simulation time runs faster (or slower) than real time - the time scale slider sets the multiplier. This way you can watch the decay of isotopes that live from fractions of a second to billions of years.
Well-known isotopes
- H-3 - Tritium - glowing watch hands, nuclear fusion fuel.
- C-14 - Radiocarbon dating.
- K-40 - Natural radioactivity - in bananas and in our bodies.
- Co-60 - Radiotherapy and radiation sterilization.
- I-131 - Thyroid treatment; Chernobyl fallout.
- Cs-137 - Long-lasting contamination after Chernobyl and Fukushima.
- Rn-222 - Radon in basements and mines.
- Ra-226 - The longest-lived isotope of radium - the element discovered by Marie and Pierre Curie in 1898.
- U-235 - Nuclear power plant fuel; start of the actinium series.
- U-238 - Age of the Earth; start of the uranium series.
- Pu-238 - Power source for space probes (Voyager, Curiosity rover).
- Am-241 - Ionization smoke detectors.
Data sources
- NNDC Wallet Cards 2023 - Data as of 15 October 2024 - licence: Public domain