| 词汇 | example_english_spontaneous-fission |
| 释义 | spontaneous fissioncollocation in Englishmeanings of spontaneousand fissionThese words are often used together. Click on the links below to explore the meanings. Or, see other collocations with fission. spontaneous adjective uk /spɒnˈteɪ.ni.əs/ us /spɑːnˈteɪ.ni.əs/ happening or done in a natural, often sudden way, without any planning or without ... See more at spontaneous fission noun[U] uk /ˈfɪʃ.ən/ us /ˈfɪʃ.ən/ physicsspecialized the process of dividing the nucleus of an atom, resulting in the release of a large amount of ... See more at fission Examples of spontaneous fissionThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Most of these decay predominantly through alpha decay, but some undergo spontaneousfission. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. One microgram (g) of californium-252 emits 2.3 million neutrons per second, an average of 3.7 neutrons per spontaneousfission. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These occur when atoms react with natural neutrons (from cosmic rays, spontaneousfission, or other sources), or are bombarded directly with cosmic rays. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This type of fission (called spontaneousfission) is rare except in a few heavy isotopes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. One possible neutron source is californium-252 which undergoes spontaneousfission. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The size and cost of these neutron sources are also comparable to spontaneousfission sources. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. All these isotopes are characterized by high rates of spontaneousfission. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For this reason, these elements undergo spontaneousfission. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A fourth decay by direct spontaneousfission was also proposed. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He was one of the discoverers of spontaneousfission. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. After observing the five alpha decay events that generate dubnium-268, spontaneousfission events were observed with a long half-time. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This further underwent spontaneousfission with a half-time of about 1.3 h. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is primarily artificial, only trace quantities existing in nature produced by spontaneousfission or neutron capture by molybdenum. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Naturally occurring technetium occurs as a spontaneousfission product in uranium ore or by neutron capture in molybdenumores. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Thorium-232 is the lightest primordial nuclide that has left evidence of undergoing spontaneousfission in its minerals. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The high spontaneousfission rate of californium-252 was observed in these samples. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In both cases, they were unable to detect any spontaneousfission from nuclei of bohrium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Finally, promethium can be formed in nature as a product of spontaneousfission of uranium-238. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Element 41 (niobium) is theoretically unstable via spontaneousfission, but this has never been detected. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Cd - are absolutely stable (except, theoretically, to spontaneousfission). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Want to learn more? Go to the definition of spontaneous Go to the definition of fission See other collocations with fission |
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