One more darmstadtium isotope was synthesized at the SHE Factory

On February 27, 2023 the unknown before ²⁷⁵Ds isotope was observed during FLNR SHE Factory’s experiments.

Alexander Karpov, FLNR Scientific secretary explained that ²⁷⁵Ds nucleus was produced at SHE Factory DGFRS-II separator in the interaction of calcium-48 beam with thorium-232 target material. The main purpose of the experiment was to prepare for the future synthesis of chemical element 120.

Darmstadtium isotopes were successfully synthesized for the first time in ⁴⁸Ca – ²³²Th reaction at FLNR SHE Factory in 2022. As a result three unknown before isotopes were discovered at once: darmstadtium-276, hassium-272 and siborgium-268. In 2023 the experiment was continued at higher beam energy. It resulted in one event of darmstadtium-276 and one event of darmstadtium-275.

New darmstadtium-275 isotope experienced alpha decay producing hassium-271. ²⁷⁵Ds half-life was 60 microsecs. The study of this reaction will be continued.