Isotope: Indium-98
General data
| Element name | Indium |
|---|---|
| Chemical symbol | In |
| Atomic number Z | 49 |
| Isotope name (symbol) | Indium-98 (In-98) |
| Neutron number N | 49 |
| Mass number A=Z+N | 98 |
Ground state
| Half-life | 30 ± 1 ms |
|---|---|
| Spin / Parity | (0+) |
| Mass excess | -53900 ± 300 keV (S) |
Decay branches
EC/β⁺ 100% ECp 0.13%Isomers
| Isomer | Energy | Half-life | Spin / Parity | Decay branches |
|---|---|---|---|---|
| Isomer 1 | 800 ± 700 keV | 0.89 ± 0.02 s | (9+) | EC/β⁺ 100% ECp 44 ± 2% |
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
- Indium-98 30 ms
- Cadmium-98 9.3 s · 99.9%
- Silver-98 47.5 s · 99.8%
- Palladium-98 17.7 min · 99.8%
- Rhodium-98 8.74 min · 99.8%
- Ruthenium-98 stable · 99.8%
- Silver-97 25.5 s · 0.13%
- Palladium-97 3.1 min · 0.16%
- Rhodium-97 30.8 min · 0.16%
- Ruthenium-97 2.8376 d · 0.16%
- Technetium-97 4.21×10⁶ a · 0.16%
- Molybdenum-97 stable · 0.16%
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