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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.
The radiation from curium is so strong that the metal glows purple in the dark. Curium is one of the most radioactive isolable elements. Its two most common isotopes 242 Cm and 244 Cm are strong alpha emitters (energy 6 MeV); they have fairly short half-lives, 162.8 days and 18.1 years, and give as much as 120 W/g and 3 W/g of heat, respectively.
This is a list of radioactive nuclides (sometimes also called isotopes), ordered by half-life from shortest to longest, in seconds, minutes, hours, days and years. Current methods make it difficult to measure half-lives between approximately 10 −19 and 10 −10 seconds.
Pages in category "Isotopes of curium" The following 22 pages are in this category, out of 22 total. This list may not reflect recent changes. ...
This behavior is markedly different from that of its neighbor curium which exhibits antiferromagnetic transition at 52 K. [49] The thermal expansion coefficient of americium is slightly anisotropic and amounts to (7.5 ± 0.2) × 10 −6 /°C along the shorter a axis and (6.2 ± 0.4) × 10 −6 /°C for the longer c hexagonal axis. [46]
While curium metal has been discovered to naturally exist as a mixture of 87.4% 244 Cm, 8.4% 243 Cm, 3.9% other curium isotopes, and ~0.3% of the daughter nuclide, plutonium, in most aerosolized syntheses of curium(III) oxide, curium metal is purified through solvent extraction of curium nitrate and bis(2-ethylhexyl) phosphoric acid in toluene ...
Three isotopes, 225 Ac, 227 Ac and 228 Ac, were found in nature and the others were produced in the laboratory; only the three natural isotopes are used in applications. Actinium-225 is a member of the radioactive neptunium series ; [ 60 ] it was first discovered in 1947 as a decay product of uranium-233 and it is an α-emitter with a half-life ...
Berkelium is a soft, silvery-white, radioactive actinide metal. In the periodic table, it is located to the right of the actinide curium, to the left of the actinide californium and below the lanthanide terbium with which it shares many similarities in physical and chemical properties.