being 236m Np (t1/2 22.5 hours). The isotopes of neptunium range from 219 Np to 244 Np , though the intermediate isotope 221 Np has not yet been observed...

all of its isotopes above bismuth-209, but is now being resurrected thanks to artificial production of neptunium on the tonne scale. The isotopes neptunium-235...

often after a series of decays, a stable isotope is reached: there are 251 stable isotopes in the universe. In stable isotopes, light elements typically...

isotopes of plutonium, having mass numbers 228–247. The most stable isotope of plutonium is 244Pu with half-life of 8.13×107 years. Eighteen isotopes...

before 244Pu are isotopes of uranium and neptunium (not considering fission products), and the primary decay products after are isotopes of americium. mPu –...

observationally stable isotopes: 204Pb, 206Pb, 207Pb, 208Pb. Lead-204 is entirely a primordial nuclide and is not a radiogenic nuclide. The three isotopes lead-206...

Thallium (81Tl) has 41 isotopes with atomic masses that range from 176 to 216. 203Tl and 205Tl are the only stable isotopes and 204Tl is the most stable...

Other isotopes such as uranium-233 have been produced in breeder reactors. In addition to isotopes found in nature or nuclear reactors, many isotopes with...

an isotope of actinium. It undergoes alpha decay to francium-221 with a half-life of 10 days, and is an intermediate decay product in the neptunium series...

11 have 5 stable isotopes, 9 have 4 stable isotopes, 5 have 3 stable isotopes, 16 have 2 stable isotopes, and 26 have 1 stable isotope. Additionally, about...

This is a list of radioactive nuclides (sometimes also called isotopes), ordered by half-life from shortest to longest, in seconds, minutes, hours, days...

the atomic number of uranium. All of them are radioactively unstable and decay into other elements. With the exception of neptunium and plutonium which...

irradiation of neptunium-237. Plutonium isotopes undergo radioactive decay, which produces decay heat. Different isotopes produce different amounts of heat per...

in the decay chain of the primordial isotopes thorium-232, uranium-238, and uranium-235. Examples include the natural isotopes of polonium and radium...

actinium almost exclusively consists of one isotope, 227Ac, with only minute traces of other shorter-lived isotopes (225Ac and 228Ac) occurring in other...

Francium-221 has a half-life of 4.8 minutes. It is the ninth product of the neptunium decay series as a daughter isotope of actinium-225. Francium-221 then...

creating neptunium-238. 238 92U + 2 1H → 238 93Np + 2 n The neptunium isotope then undergoes β− decay to plutonium-238, with a half-life of 2.12 days:...

nuclear chain reaction. As such, while all fissile isotopes are fissionable, not all fissionable isotopes are fissile. In the arms control context, particularly...

list can instead be found in Template:Navbox element isotopes. The symbols for the named isotopes of hydrogen, deuterium (D), and tritium (T) are still...

expected to fall within the range of the island of stability, potentially conferring additional stability on some isotopes, especially 306Ubb which is expected...

has isotopes that are not radioactive, these are termed "stable" isotopes. All of the known stable isotopes occur naturally (see primordial isotope). The...

undergo beta decay to form neptunium isotopes. In nature, uranium is found as uranium-238 (99.2742%) and uranium-235 (0.7204%). Isotope separation concentrates...

synthesized by neutron-capture. Because of this impediment in forming heavier isotopes, these short-lived isotopes 258–260Fm constitute the "fermium gap...

have to go through isotopes separation to remove the 115, 117 and 119 tin isotopes. Combined, these three isotopes make up about 17% of natural tin but represent...

uranium-233 (the fissile material at the heart of the thorium fuel cycle). Neptunium-237 and some isotopes of americium might be usable, but it is not clear...

half-lives exceeding the age of the universe for the heaviest isotopes like 335Ts when beta decay is not considered. Lighter isotopes of tennessine may be produced...

Curium isotopes are inevitably present in spent nuclear fuel (about 20 g/tonne). The isotopes 245Cm–248Cm have decay times of thousands of years and...

aimed at a mixed-isotope californium target containing 249Cf, 250Cf, and 251Cf, with the aim of producing the heavier oganesson isotopes 295Og and 296Og...

elements, it has no stable isotopes. The first isotope to be synthesized was 284Nh as a decay product of 288Mc in 2003. The first isotope to be directly synthesized...

recently americium-241 are the most often cited candidate isotopes, but 43 more isotopes out of approximately 1,300 were considered at the beginning in...