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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.
The high short-term radioactivity of spent nuclear fuel is primarily from fission products with short half-life.The radioactivity in the fission product mixture is mostly due to short-lived isotopes such as 131 I and 140 Ba, after about four months 141 Ce, 95 Zr/ 95 Nb and 89 Sr constitute the largest contributors, while after about two or three years the largest share is taken by 144 Ce/ 144 ...
The longest-lived radioisotope is 14 C, with a half-life of 5.70(3) × 10 3 years. This is also the only carbon radioisotope found in nature, as trace quantities are formed cosmogenically by the reaction 14 N + n → 14 C + 1 H. The most stable artificial radioisotope is 11 C, which has a half-life of 20.3402(53) min. All other radioisotopes ...
129 I is one of the seven long-lived fission products that are produced in significant amounts. Its yield is 0.706% per fission of 235 U. [7] Larger proportions of other iodine isotopes such as 131 I are produced, but because these all have short half-lives, iodine in cooled spent nuclear fuel consists of about 5/6 129 I and 1/6 the only stable iodine isotope, 127 I.
Keep scrolling for all the longest standing ovations at the 2024 Cannes Film Festival so far: ‘The Substance’ Starring: Demi Moore, Margaret Qualley, Dennis Quaid, Ray Liotta
Opening Night: Hamlet (Grigori Kozintsev, USSR); Closing Night: The Big City (Satyajit Ray, India); Alone Across the Pacific (Kon Ichikawa, Japan); Band of Outsiders (Jean-Luc Godard, France)
KENNEBUNKPORT, Maine (AP) - Former President George H.W. Bush celebrates his 90th birthday Thursday. A list of the 10 longest-lived U.S. presidents, their age and the day they died, if applicable: 1.
The completed film debuted at the Fantasia International Film Festival in Canada on July 23, 2017. After a few film festival tours, Hori re-cut the film and it was given a wide release on March 26, 2021, in Japan. Khrustalyov, My Car! 1998: 7: Production lasted for seven years due to difficulties in financial backing. [57] Kill It and Leave ...