Er-169.md

title	header	last_modified_at
Erbium-169	teaser /assets/images/spectra-th/Er-169.png	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.

Spectrum (Fullscreen)

<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.

Metadata

Isotope:	Erbium
Mass number:	169
Atomic number:	68
Neutron number:	101
...	...

Sources and Further Read

• https://en.wikipedia.org/wiki/Isotopes_of_erbium