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Contents. Isotopes of curium. Curium (96 Cm) is an artificial element with an atomic number of 96. Because it is an artificial element, a standard atomic weight cannot be given, and it has no stable isotopes. The first isotope synthesized was 242 Cm in 1944, which has 146 neutrons. There are 19 known radioisotopes ranging from 233 Cm to 251 Cm.
Curium is not currently used as nuclear fuel due to its low availability and high price. [44] 245 Cm and 247 Cm have very small critical mass and so could be used in tactical nuclear weapons, but none are known to have been made. Curium-243 is not suitable for such, due to its short half-life and strong α emission, which would cause excessive ...
Pages in category "Isotopes of curium" ... Curium-252 This page was last edited on 7 October 2010, at 02:00 (UTC). Text is available under the Creative ...
Radioactive isotope table "lists ALL radioactive nuclei with a half-life greater than 1000 years", incorporated in the list above. The NUBASE2020 evaluation of nuclear physics properties F.G. Kondev et al. 2021 Chinese Phys. C 45 030001. The PDF of this article lists the half-lives of all known radioactives nuclides.
About 18 isotopes and 11 nuclear isomers are known for americium, having mass numbers 229, 230, and 232 through 247. [3] There are two long-lived alpha-emitters; 243 Am has a half-life of 7,370 years and is the most stable isotope, and 241 Am has a half-life of 432.2 years.
Vienna Standard Mean Ocean Water is the current international standard for water isotopes. Naturally occurring water is almost completely composed of the neutron-less hydrogen isotope protium. Only 155 ppm include deuterium (2 H or D), a hydrogen isotope with one neutron, and fewer than 20 parts per quintillion include tritium (3
The isotope 248 Bk was first obtained in 1956 by bombarding a mixture of curium isotopes with 25 MeV α-particles. Although its direct detection was hindered by strong signal interference with 245 Bk, the existence of a new isotope was proven by the growth of the decay product 248 Cf which had been previously characterized.
Among 19 isotopes of curium, ranging in mass number from 233 to 251, [58] the most accessible are 242 Cm and 244 Cm; they are α-emitters, but with much shorter lifetime than the americium isotopes. These isotopes emit almost no γ-radiation, but undergo spontaneous fission with the associated emission of neutrons.