Redefining Nuclear Magic: Physicists Have Discovered Two New Isotopes

Researchers at the Institute of Modern Physics and collaborators have discovered two new isotopes, osmium-160 and tungsten-156, revealing potential for lead-164 to be a stable, doubly magic nucleus. This breakthrough enhances the understanding of nuclear stability and challenges traditional views on magic numbers, indicating a significant step forward in nuclear physics., along with their collaborators, have created two novel isotopes—osmium-160 and tungsten-156.

Will other traditional magic numbers disappear in extremely neutron-deficient nuclear regions? Further exploration is of great significance to enrich and develop nuclear theories and to deepen our understanding of nuclear forces.In this study, researchers carried out the experiment at the gas-filled recoil separator-Spectrometer for Heavy Atoms and Nuclear Structure , which is located at the Heavy Ion Research Facility in Lanzhou, China.

Using the fusion evaporation reaction, researchers synthesized osmium-160 and tungsten-156 for the first time. They measured the α-particle energy and the half-life of osmium-160, which is an α-emitting isotope. Meanwhile, they determined that the daughter nucleus, tungsten-156, is a βWith the newly measured α-decay data, researchers derived the α-decay reduced width for osmium-160 and compared it with other nuclei with 84 neutrons but fewer protons.

Moreover, researchers suggested that the enhanced stability of 82-neutron shell closure can be attributed to the increasing closeness to the doubly magic nucleus lead-164, which might be a stable nucleus with 82 protons and 82 neutrons. Although lead-164 is predicted beyond the proton-drip line, the enhanced shell effect has the potential to make it a bound or quasi-bound nucleus.

Source: Tech Daily Report (techdailyreport.net)

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