There are also four known nuclear isomers ( 243m Cm, 244m Cm, 245m Cm, and 249m Cm ).
22.
Additionally, 47 nuclear isomers ( long-lived excited nuclear states ), of 24 lead isotopes, have been characterized.
23.
Practical difficulties arise from the need to ensure safety from the spontaneous radioactive decay of nuclear isomers in quantities sufficient for experimentation.
24.
User User : Drac2000 is a single-issue editor, only editing topics related to nuclear isomers to defend the concept.
25.
Much smaller trace amounts of the short-lived nuclear isomer protactinium-234m occur in the decay chain of uranium-238.
26.
Astatine has 24 known nuclear isomers, which are nuclei with one or more nucleons ( protons or neutrons ) in an excited state.
27.
This is the only case of a nuclear isomer which has a half life so long that it has never been observed to decay.
28.
Technetium-99m ( 99m Tc ) is a metastable nuclear isomer which emits gamma rays which can be detected by a gamma camera.
29.
They seem to be an earnest and overly credulous attempt to explain a series of nuclear isomer experiments that DARPA canned in the 1990s.
30.
"' Cadmium-113m "'is a cadmium radioisotope and nuclear isomer with a half-life of 14.1 years.
