Isotope: Tin-140
General data
| Element name | Tin |
|---|---|
| Chemical symbol | Sn |
| Atomic number Z | 50 |
| Isotope name (symbol) | Tin-140 (Sn-140) |
| Neutron number N | 90 |
| Mass number A=Z+N | 140 |
Ground state
| Half-life | unknown |
|---|---|
| Spin / Parity | 0+ |
| Mass excess | -34500 ± 300 keV (S) |
Decay branches
β⁻ 100% β⁻n β⁻2nIsomers
no isomers in the NNDC data
No half-life data - simulation unavailable.
Produced by decay of
NNDC data contain no decay that leads to this isotope.
Many isotopes are also produced, often mainly, in nuclear reactions (e.g. Co-60 from Co-59 by neutron capture, C-14 from nitrogen-14 in the atmosphere) and in fission (e.g. Cs-137, I-131) - those routes are not listed here.
Radioactive decay series
- Tin-140 unknown
- Antimony-140 171 ms
- Tellurium-140 351 ms · 69.4%
- Iodine-140 380 ms · 69.4%
- Xenon-140 13.6 s · 63.3%
- Cesium-140 64.0 s · 63.3%
- Barium-140 12.7526 d · 63.3%
- Lanthanum-140 40.284 h · 63.3%
- Cerium-140 stable · 63.3%
- Tellurium-139 0.72 s · 23.0%
- Iodine-139 2.29 s · 23.0%
- Xenon-139 39.72 s · 26.9%
- Cesium-139 9.25 min · 26.9%
- Barium-139 82.89 min · 26.9%
- Lanthanum-139 stable · 26.9%
- Tellurium-138 1.5 s · 7.6%
- Iodine-138 6.30 s · 7.1%
- Xenon-138 14.14 min · 9.0%
- Cesium-138 32.48 min · 9.0%
- Barium-138 stable · 9.0%
- Iodine-137 24.13 s · 0.48%
- Xenon-137 3.821 min · 0.83%
- Cesium-137 30.007 a · 0.83%
- Barium-137 stable · 0.83%
- Xenon-136 2.19×10²¹ a · 0.037%
- Barium-136 stable · 0.037%
Decay notation
| Notation | Name | On the chart | Description |
|---|---|---|---|
| α | alpha decay | Alpha decay is the emission of a helium nucleus (2 protons + 2 neutrons): Z−2, A−4. | |
| β⁻, 2β⁻ | beta-minus decay | In beta-minus decay a neutron turns into a proton and the nucleus emits an electron: Z+1, A unchanged. 2β⁻ is double beta decay. | |
| EC, EC/β⁺ | electron capture / beta-plus decay | A proton turns into a neutron: the nucleus captures a shell electron (EC) or emits a positron (β⁺): Z−1, A unchanged. | |
| p, 2p, 3p | proton emission | Proton emission is the ejection of a proton from the nucleus: Z−1, A−1. 2p, 3p - two, three protons. | |
| n, 2n…4n | neutron emission | Neutron emission is the ejection of a neutron from the nucleus: A−1, Z unchanged. 2n…4n - several neutrons. | |
| ¹⁴C, ²⁴Ne… | cluster emission | Cluster emission is the ejection of a light nucleus, e.g. ¹⁴C, ²⁰O, ²⁴Ne, ²⁸Mg, ³⁴Si. It is a very rare transformation. | |
| IT | isomeric transition | An isomeric transition takes a nucleus from an excited state (an isomer, e.g. Pa-234m) to the ground state, usually emitting a γ photon: Z and A unchanged. | |
| β⁻n, ECp, ECα… | delayed emission | Delayed emission is the emission of a particle (n, p or α) right after β⁻ decay or electron capture. The arrow has the colour of the emitted particle and its label shows the transformation, e.g. “β⁻n 63%”. | |
| SF | spontaneous fission | no arrow | Spontaneous fission is the splitting of a nucleus into two fragments of random masses. There is no single daughter, so the chart shows no arrow - it is listed in the decay branches and in the tile tooltip. |
Data sources
- NNDC Wallet Cards 2023 - Data as of 15 October 2024 - licence: Public domain