No results — there are no stable or naturally occurring dubnium isotopes.
Note the search asks for dubnium isotopes that meet strict criteria such as natural occurrence or long-term stability. Dubnium is element 105 and is a synthetic, heavy element. All of its isotopes are made in laboratories and decay in seconds, minutes, or hours. No isotope of dubnium survives in nature or meets the usual criteria for a “complete” natural isotope list.
Understand why this criterion yields an empty list. High atomic number makes nuclei unstable. Dubnium isotopes undergo alpha decay and spontaneous fission. Scientists must create them in particle accelerators by fusing lighter nuclei. Measured isotopes have mass numbers roughly in the mid-250s to the 270s and live only briefly. Experimental yields are tiny and decay data often carry large uncertainties. For authoritative records, consult ENSDF, NUBASE, NNDC, and IAEA databases.
Explore close alternatives and related topics instead. Check the published lists of known synthetic dubnium isotopes and their decay properties. See isotope tables for neighboring elements like rutherfordium (Rf) and seaborgium (Sg). Read discovery histories, production reactions (bombarding americium, berkelium, or californium targets with neon, oxygen, or calcium beams), and compilations of measured half-lives and decay modes.
