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Naturally occurring xenon (54 Xe) consists of seven stable isotopes and two very long-lived isotopes. Double electron capture has been observed in 124 Xe (half-life 1.8 ± 0.5(stat) ± 0.1(sys) × 10 22 years) [2] and double beta decay in 136 Xe (half-life 2.165 ± 0.016(stat) ± 0.059(sys) × 10 21 years), [7] which are among the longest measured half-lives of all nuclides.
For example, because Kr is lighter than Xe, Kr should also have escaped in a neutral wind. Yet the isotopic distribution of atmospheric Kr on Earth is significantly less fractionated than atmospheric Xe. [16] Mass fractionation of nine atmospheric xenon isotopes over Earth's history compared to modern air per atomic mass unit. [15]
Pages in category "Isotopes of xenon" The following 60 pages are in this category, out of 60 total. ... Xenon-124; Xenon-125; Xenon-125m1; Xenon-125m2; Xenon-126 ...
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. [1]
The stable isotope xenon-132 has a fission product yield of ... Some radioactive isotopes of xenon (for example, ... [124] An unusual ion containing xenon is the ...
In April 2019 it was announced that the half-life of xenon-124 had been measured to 1.8 × 10 22 years. This is the longest half-life directly measured for any unstable isotope; [4] only the half-life of tellurium-128 is longer. [citation needed]
Why tourists are being told to wipe their shoes before visiting the ‘world’s clearest lake’
The noble gases up to xenon have multiple stable isotopes; krypton and xenon also have naturally occurring radioisotopes, namely 78 Kr, 124 Xe, and 136 Xe, all have very long lives (> 10 21 years) and can undergo double electron capture or double beta decay.