No erbium isotopes meet the specified criteria
The requested filter returns no entries because the post requires a complete, fully verified data set for each isotope. Demand includes mass number, half-life, decay mode, spin/parity, natural abundance, and a confirmed discovery year. No erbium isotope record in the chosen authoritative sources satisfies every one of those fields to the required standard. Present the result as empty.
Expect this outcome for technical reasons. Many erbium nuclides are short-lived or have uncertain or conflicting measurements. Some isotopes lack a measured half-life or a confirmed spin/parity. Other entries lack a clear discovery citation or a standardized abundance value. Databases such as NUBASE, ENSDF/NNDC, and IUPAC apply strict validation. This strictness creates an empty list when every field must be present and verified.
Explore close alternatives instead. Stable erbium isotopes exist (for example, Er‑166, Er‑167, Er‑168, Er‑170) and make good starting points. Short‑lived radioisotopes (for example, Er‑169) and neighboring lanthanide isotope lists (holmium, thulium) also offer usable data. Check primary sources like NUBASE, ENSDF/NNDC, and the IAEA Live Chart for validated tables, and consider assembling a sortable table of near‑complete entries or a downloadable CSV of verified fields.
