isotlist3 - aibolem/00 GitHub Wiki

Hydrogen-2 deuterium

Helium-4 no mass number 5

Lithium-7 no mass number 8

Potassium-40 (B, E) – long-lived primordial radionuclide

Calcium-40 (2E)*

Calcium-46 (2B)*

Calcium-48 (2B) – long-lived primordial radionuclide (B also predicted possible)

Vanadium-50 (B, E) – long-lived primordial radionuclide

Chromium-50 (2E)*

Nickel-58 (2E)*

Germanium-76 (2B) – long-lived primordial radionuclide

Selenium-74 (2E)

Selenium-80 (2B)

Selenium-82 (2B) – long-lived primordial radionuclide

Krypton-78 (2E) – long-lived primordial radionuclide

Krypton-86 (2B)

Rubidium-87 (B) – long-lived primordial radionuclide

Strontium-84 (2E)*

Zirconium-94 (2B)*

Zirconium-96 (2B) – long-lived primordial radionuclide (B also predicted possible)

Molybdenum-92 (2E)*

Molybdenum-98 (2B)*

Molybdenum-100 (2B) – long-lived primordial radionuclide

Technetium – no stable isotopes

Ruthenium-96 (2E)*

Ruthenium-104 (2B)

Palladium-102 (2E)

Palladium-110 (2B)*

Cadmium-106 (2E)*

Cadmium-108 (2E)*

Cadmium-113 (B) – long-lived primordial radionuclide

Cadmium-114 (2B)*

Cadmium-116 (2B) – long-lived primordial radionuclide

Indium-115 (B) – long-lived primordial radionuclide

Tellurium-120 (2E)*

Tellurium-123 (E)*

Tellurium-128 (2B) – long-lived primordial radionuclide

Tellurium-130 (2B) – long-lived primordial radionuclide

Xenon-124 (2E) – long-lived primordial radionuclide

Xenon-134 (2B)*

Xenon-136 (2B) – long-lived primordial radionuclide

Barium-130 (2E) – long-lived primordial radionuclide

Barium-132 (2E)*

Lanthanum-138 (B, E) – long-lived primordial radionuclide

Cerium-136 (2E)*

Cerium-138 (2E)*

Cerium-142 (α, 2B)*

Praseodymium-141

Neodymium-143 (α)

Neodymium-144 (α) – long-lived primordial radionuclide

Neodymium-145 (α)*

Neodymium-146 (α, 2B)* no mass number 147§

Neodymium-148 (α, 2B)*

Neodymium-150 (2B) – long-lived primordial radionuclide

Promethium - no stable isotopes

Samarium-144 (2E)

Samarium-146 (α) – probable long-lived primordial radionuclide

Samarium-147 (α) – long-lived primordial radionuclide

Samarium-148 (α) – long-lived primordial radionuclide

Samarium-149 (α)*

Samarium-150 (α) no mass number 151§

Samarium-152 (α)

Samarium-154 (2B)*

Europium-151 (α) – long-lived primordial radionuclide

Europium-153 (α)*

Gadolinium-152 (α) – long-lived primordial radionuclide (2E also predicted possible)

Gadolinium-154 (α)

Gadolinium-155 (α)

Gadolinium-160 (2B)*

Dysprosium-156 (α, 2E)*

Dysprosium-158 (α)

Dysprosium-160 (α)

Dysprosium-161 (α)

Dysprosium-162 (α)

Holmium-165 (α)

Erbium-162 (α, 2E)*

Erbium-164 (α, 2E)

Erbium-166 (α)

Erbium-167 (α)

Erbium-168 (α)

Erbium-170 (α, 2B)*

Thulium-169 (α)

Ytterbium-168 (α, 2E)*

Ytterbium-170 (α)

Ytterbium-171 (α)

Ytterbium-172 (α)

Ytterbium-173 (α)

Ytterbium-174 (α)

Ytterbium-176 (α, 2B)*

Lutetium-175 (α)

Lutetium-176 (B) – long-lived primordial radionuclide (α, E also predicted possible)

Hafnium-174 (α) – long-lived primordial radionuclide (2E also predicted possible)

Hafnium-176 (α)

Hafnium-177 (α)

Hafnium-178 (α)

Hafnium-179 (α)

Hafnium-180 (α)

Tantalum-180m (α, B, E, IT)* ^

Tantalum-181 (α)

Tungsten-180 (α) – long-lived primordial radionuclide (2E also predicted possible)

Tungsten-182 (α)*

Tungsten-183 (α)*

Tungsten-184 (α)*

Tungsten-186 (α, 2B)*

Rhenium-185 (α)

Rhenium-187 (B) – long-lived primordial radionuclide (A also predicted possible)

Osmium-184 (α) – long-lived primordial radionuclide (2E also predicted possible)

Osmium-186 (α) – long-lived primordial radionuclide

Osmium-187 (α)

Osmium-188 (α)

Osmium-189 (α)

Osmium-190 (α)

Osmium-192 (α, 2B)*

Iridium-191 (α)

Iridium-193 (α)

Platinum-190 (α) – long-lived primordial radionuclide (2E also predicted possible)

Platinum-192 (α)*

Platinum-194 (α)

Platinum-195 (α)*

Platinum-196 (α)

Platinum-198 (α, 2B)*

Mercury-196 (α, 2E)*

Mercury-198 (α)

Mercury-199 (α)

Mercury-200 (α)

Mercury-201 (α)

Mercury-202 (α)

Mercury-204 (2B)

Thallium-203 (α)

Thallium-205 (α)

Bismuth ^^ and above – no stable isotopes no mass number 209 and above

Bismuth-209 (α) – long-lived primordial radionuclide

Thorium-232 (α, SF) – long-lived primordial radionuclide (2B also predicted possible)

Uranium-235 (α, SF) – long-lived primordial radionuclide

Uranium-238 (α, 2B, SF) – long-lived primordial radionuclide

Plutonium-244 (α, SF) – probable long-lived primordial radionuclide (2B also predicted possible)

Abbreviations for predicted unobserved decay: [1] [2] [3]

α for alpha decay, B for beta decay, 2B for double beta decay, E for electron capture, 2E for double electron capture, IT for isomeric transition, SF for spontaneous fission, * for the nuclides whose half-lives have lower bound. Double beta decay has only been listed when beta decay is not also possible.

^ Tantalum-180m is a "metastable isotope", meaning it is an excited nuclear isomer of tantalum-180. See isotopes of tantalum. However, the half-life of this nuclear isomer is so long that it has never been observed to decay, and it thus is an "observationally stable" primordial nuclide, a rare isotope of tantalum. This is the only nuclear isomer with a half-life so long that it has never been observed to decay. It is thus included in this list.

^^ Bismuth-209 was long believed to be stable, due to its half-life of 2.01×1019 years, which is more than a billion times the age of the universe.

§ Europium-151 and samarium-147 are primordial nuclides with very long half-lives of 4.62×1018 years and 1.066×1011 years, respectively.

See also

Isotope geochemistry

List of elements by stability of isotopes

List of nuclides (991 nuclides in order of stability, all with half-lives over one hour)

Mononuclidic element

Primordial nuclide

Stable isotope ratio

Table of nuclides

Valley of stability