| title |
Erbium-169 |
| header |
| teaser |
/assets/images/spectra-th/Er-169.png |
|
| last_modified_at |
2022-08-24 15:10:00 +0200 |
Naturally occurring erbium (68Er) is composed of 6 stable isotopes, with 166Er being the most abundant (33.503% natural abundance). 39 radioisotopes have been characterized with between 74 and 112 neutrons, or 142 to 180 nucleons, with the most stable being 169Er with a half-life of 9.4 days. It is used as a radiopharmaceutical. All of the remaining radioactive isotopes have half-lives that are less than 3.5 hours, and the majority of these have half-lives that are less than 4 minutes.
<iframe width="100%" height="500" src="/assets/spectra/Er-169.html" title="Er-169 gamma spectrum" frameborder="0" allowfullscreen></iframe>
30 minute measurement with a High Purity Germanium (HPGe) radiation detector.
| Isotope: |
Erbium |
| Mass number: |
169 |
| Atomic number: |
68 |
| Neutron number: |
101 |
| ... |
... |