A new type of atomic nucleus was discovered through fusion and subsequent recoil

A new type of atomic nucleus was discovered through fusion and subsequent recoil


 Scientists have made a significant discovery by identifying the lightest isotope of astatine, a rare and rapidly deteriorating material. Henna Kokkonen, a recent MSc graduate, made the discovery of 190-Astatine as part of her thesis work, expanding our understanding of the structure of atomic nuclei and the limits of the material universe.

The new atomic nucleus, 190-Astatine, was created in an experiment at the Accelerator Laboratory of the University of Jyväskylä in Finland. It consists of 85 protons and 105 neutrons. The atomic nucleus is the most delicate astatine isotope ever found.

Because of how quickly it decays, astuteness is in short supply. It is believed that there is no more than a tablespoon of astatine in the Earth's crust. The atomic nucleus 190-Astatine was created in an experiment at the Accelerator Laboratory of the University of Jyväskylä in Finland. The new isotope was created by the fusion of particles from an 84Sr beam with silver atoms in a target. RITU recoil separator detectors were able to identify the isotope in the byproducts. A newly created nucleus releases alpha particles.

Alpha decay leads the newly formed nuclei to become more stable isotopes. Heavy nuclei often decay through alpha decay.

Doctoral candidate Henna Kokkonen of the Department of Physics at the University of Jyväskylä explains why studying novel nuclei is crucial for expanding our understanding of the structure of atomic nuclei and the boundaries of known matter.

This research is a major component of my master's thesis. The newly minted Master of Science holder, Henna Kokkonen, has made a groundbreaking discovery. Her master's thesis included this research. Reporting a novel isotope in a peer-reviewed publication like Physical Review C is an even more unusual outcome of a master's thesis. The new isotope was discovered by my analysis of experimental data, which I presented in my thesis. I became familiar with the Nuclear Spectroscopy Group's work during my thesis process and summer internships. I'm excited to join the team and go to work on my Ph.D.

Henna Kokkonen is a Doctoral Researcher in the Accelerator Laboratory at the University of Jyväskylä. She originally came to the city from Juva in south-eastern Finland to study physics and has been there for five years.

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