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Friday, October 16, 2026 · UTC
The Sky & Telescopes

Researchers find krypton-88 capture rate below theoretical predictions

A measurement at the FRIB and ATLAS accelerator facilities puts the krypton-88 neutron-capture rate consistently lower than predicted, the quantity named behind a strontium shortfall in i-process models.

Arjun Nair
Astronomy Editor
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Researchers at the Facility for Rare Isotope Beams (FRIB) and the Argonne Tandem Linac Accelerator System (ATLAS) in the US, with 12 other institutions in Canada and Europe, measured the neutron-capture rate of krypton-88 and found it consistently lower than theoretical predictions. They produced krypton-89 and observed its gamma-ray emissions with the Summing NaI (SuN) detector, capturing the rate indirectly.[2]