麻豆传媒

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Atomic nuclei with 鈥渕agic numbers鈥� of protons or neutrons in their nuclear shells are extremely stable. Nuclear physicists are especially interested in nuclei with doubly magic numbers鈥攖hose that have full shells for both protons and neutrons. One example is the tin isotope Sn-100, which has 50 protons and 50 neutrons. To prepare for future work on Sn-100, researchers studied the properties of isotopes of indium as they approached 50 neutrons. This helps to demonstrate how adding single particles changes the properties of a nucleus.

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The Dark Energy Spectroscopic Instrument used millions of galaxies and quasars to build the largest 3D map of our universe to date. Combining the DESI data with other experiments shows signs that the impact of dark energy may be weakening over time 鈥� and the standard model of how the universe works may need an update.

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A new data release from the Dark Energy Spectroscopic Instrument is now available for researchers to explore. The collection contains information on 18.7 million galaxies, quasars, and stars 鈥� the largest dataset of its kind ever shared.

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Research by Frances Kraus, Jason Parisi and Willca Villafana will be featured in the Physics of Plasmas Early Career Collection.

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Scientists are exploring how web search engine technology might also keep the lights on, the water running and the trains moving.

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Bacteria commonly produce toxins that are lethal to themselves, but also produce the required antitoxins. These toxin-antitoxin (TA) systems may be useful in modifying bacteria for biotechnology applications, but the systems have unpredictable behavior. A new study of communities instead of individual species makes TA systems easier to understand and use.

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Simulations of equations from the Standard Model of particle physics are too difficult for classical supercomputers. In this research, scientists for the first time created scalable quantum circuits to prepare a simulation of the starting state for a particle accelerator collision to test aspects of strong interactions. The researchers first determined these circuits for small systems using classical computers, then scaled the quantum circuits to a large system on more than 100 qubits of IBM鈥檚 quantum computers.

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The transplutonium actinides are highly radioactive and rare, making them difficult to study. To examine their chemical properties, researchers typically use non-radioactive lanthanides as surrogates. In this study, scientists streamlined the synthesis of transplutonium actinide compounds, which allowed for more accurate direct comparisons of lanthanides and heavy actinide compounds, showing that transplutonium actinides have truly unique properties.

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Physicists have created a new computer code that could speed up the design of the complicated magnets that shape the plasma in stellarators, making the systems simpler and more affordable to build.

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Scientists have discovered 鈥渂erkelocene,鈥� the first organometallic molecule to be characterized containing the heavy element berkelium. The breakthrough disrupts long-held theories about the chemistry of the elements that follow uranium in the periodic table.