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 by Staff Writers Jyvaskyla, Finland (SPX) Mar 25, 2022
A new atomic nucleus 149-Lutetium, consisting of 71 protons and 78 neutrons, has been synthesized in an experiment performed in the Accelerator Laboratory of University of Jyvaskyla, Finland. The new isotope was found among the products of fusion of 58Ni beam particles and 96Ru target atoms, and it was identified in the detector setup of the MARA separator. 149Lu was found to decay into 148Yb via spontaneous proton emission, which is a rare nuclear decay mode. Decay properties of 149Lu were measured to be exceptional; It has the highest decay energy and the shortest directly measured half-life of any ground-state proton emitter known to date. Observation of the swift decay was made possible by modern digital signal handling that allows "traces" to be recorded, see attached figure for a few examples. Additionally, it was found via comparison to theoretical calculations that it is the most oblate deformed ("pumpkin shaped") proton emitter. This is the first instance when the models of proton emission are tested against such a strong oblate deformation. These observations will help to develop the theory of proton emission as well as the atomic mass models for the most exotic isotopes, both models are needed to understand the origin of the elements. The results of this study have been published as the Editors' Suggestion in Physical Review Letters.
Research Report: "Nanosecond-Scale Proton Emission from Strongly Oblate-Deformed 149 Lu"
Toshiba shareholders reject spin-off plan in key vote Tokyo (AFP) March 24, 2022 Toshiba shareholders on Thursday voted against a proposal to split the Japanese conglomerate into two, dealing a fresh blow to management that will likely spell further turmoil for the embattled company. The results of the ballot held at an extraordinary shareholder meeting are non-binding, but Toshiba had been hoping to shore up support ahead of a final vote next year on the plan to spin off its electronic devices unit. The result is the latest setback for the engineering giant, which was once ... read more
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