Nuclides isobars

Isobars—Nuclides having the same mass number but different atomic numbers. 

To avoid interferences of isobaric atomic ions of different elements and polyatomic ions at the same nominal mass, off line separation of matrix elements or analyte separation can be applied and/or enrichment and hyphenated techniques such as HPLC- or CE-ICP-MS. Analytical procedures have been developed in the author s laboratory for the determination of spallation nuclides in an irradiated tantalum target using HPLC and CE coupled on line to ICP-MS after dissolution and separation of the tantalum matrix.12,17 The mass spectra of rare earth elements (REEs)... 

A nuclide may be defined as a species of atoms, wilh specified atomic number and mass number. The term nuclide should be used, not isotope. Different nuclides having the same atomic number wv isotopes. Different nuclides having the same mass number are isobars. 

Generally, if any two isobars differ in charge by e, one had a higher ground-state energy than the other and is beta radioactive. Any nuclide that... 

WIGNER NUCLIDES. A special case of mirror nuclides. Pairs of odd-mass number isobars for which the atomic number and the neutron number differ by one, and in which the numbers of protons and neutrons are so related that each member of the pair would be transformed into the other by exchanging all neutrons for protons and vice versa. 

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