Definition of nuclear isomer in English:

nuclear isomer

noun

  • another term for isomer (sense 2)
    • ‘Scientists have known for many years that the nuclei of some elements, such as hafnium, can exist in a high-energy state, or nuclear isomer, that slowly decays to a low-energy state by emitting gamma rays.’
    • ‘In 2002, the deputy undersecretary of defense for science and technology asked the Institute for Defense Analyses to examine the evidence and prospects for controlled extraction of energy from the nuclear isomers.’