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nounan elementary particle with 0 charge and mass about equal to a proton; enters into the structure of the atomic nucleustype of:
Definition that contains neutron
- e a radioactive transuranic element produced by bombarding plutonium with neutrons
- es a radioactive transuranic element produced by bombarding plutonium with neutrons
- po a radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor
- fm a radioactive transuranic metallic element produced by bombarding plutonium with neutrons
- plutonium a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons; found in minute quantities in uranium ores but is usually synthesized in nuclear reactors; 13 isotopes are known with the most important being plutonium 239
- pu a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons; found in minute quantities in uranium ores but is usually synthesized in nuclear reactors; 13 isotopes are known with the most important being plutonium 239
- isotope one of two or more atoms with the same atomic number but with different numbers of neutrons
- zirconium a lustrous grey strong metallic element resembling titanium; it is used in nuclear reactors as a neutron absorber; it occurs in baddeleyite but is obtained chiefly from zircon
- pulsar a degenerate neutron star; small and extremely dense; rotates very fast and emits regular pulses of polarized radiation
- fermi Italian nuclear physicist (in the United States after 1939) who worked on artificial radioactivity caused by neutron bombardment and who headed the group that in 1942 produced the first controlled nuclear reaction (1901-1954)