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New isotopes 2022

New Isotopes 2024

Also this year, some isotopes were newly discovered or characterized - and as was to be expected, these are very short-lived atomic nuclei used for research.

Probably the most interesting report comes from the working group around Yu. Ts. Oganessian himself, referring to the generation and detection of Darmstadtium-275. this synthesis was achieved by the reaction 232Th(48Ca,5n)275Ds.

Already at the end of last year, the artificial production of osmium-160 and its alpha decay product tungsten-156 was reported.

Other new discoveries: Actinium-203, Fluorine-30.


 

Newly determined half-lives

The half-life values ​​of the following isotopes or nuclides have recently been re-determined and published in the specialist literature (incomplete list; old value in square brackets):


 

Standard atomic weight of lead has been changed

The atomic weight of the element lead was previously given as 207.2 ± 0.1 u. Now the IUPAC Commission on Isotopic Abundances and Atomic Weights (CIAAW) recommends changing the standard atomic weight (i.e. relative atomic mass) to 207.2 ± 1,1 and the interval notation [206,14; 207.94]. The assignment of an interval for the new standard atomic weight of lead reflects the frequent occurrence of fluctuations in isotopic abundances in normal terrestrial Pb materials (source: IUPAC) .

 


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Last update: 27/08/2024


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