Search results
Results from the WOW.Com Content Network
The most stable of californium's twenty known isotopes is californium-251, with a half-life of 898 years. This short half-life means the element is not found in significant quantities in the Earth's crust. [a] 252 Cf, with a half-life of about 2.645 years, is the most common isotope used and is produced at Oak Ridge National Laboratory (ORNL ...
half-life (t 1/2) mode ... Californium-252 (Cf-252, 252 Cf) undergoes spontaneous fission with a branching ratio of 3.09% and is used in small neutron sources.
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.
Half-life (y) Critical mass (kg) Diameter ... californium-251: 900: 5.46: 8.5 [5] californium-252: 2.6: 2.73: 6.9 [13] einsteinium-254: 0.755: 9.89: 7.1 [12]
No fission products have a half-life ... californium-252: 2.6: 2.73: 6.9 [17] einsteinium-254: 0.755: 9.89: 7.1 [16] Countries that have produced weapons-grade ...
The tables below hence start the four decay chains at isotopes of californium with mass numbers from 249 to 252. ... Half-life (billions of years) 14 (0.08)
For premium support please call: 800-290-4726 more ways to reach us
Some isotopes undergo spontaneous fission (SF) with emission of neutrons.The most common spontaneous fission source is the isotope californium-252. 252 Cf and all other SF neutron sources are made by irradiating uranium or a transuranic element in a nuclear reactor, where neutrons are absorbed in the starting material and its subsequent reaction products, transmuting the starting material into ...