Advanced computational methods and supporting experiments, including work performed at the Department of Energys Oak Ridge National Laboratory, are giving scientists a better understanding of the nature and stability of superheavy nuclei and the heaviest elements that lie beyond the borders of the periodic table.
Nature magazine on Thursday published a review article that describes collaborative work by researchers at Oak Ridge National Laboratory and the University of Tennessee and researchers at universities in Poland and Belgium. The authors describe the behavior of super-heavy nuclei -- those chock full of protons and neutrons to the point that they tax the physical forces that hold them together. "Predicting the stabilities of extremely heavy nuclei has been a long-term goal of nuclear scientists. This research represents the very best we can do at predicting the structure of these species," said Witold Nazarewicz, a researcher in ORNLs Physics Division and UTs Department of Physics and Astronomy.
The paper describes how the protons and neutrons of extremely heavy nuclei arrange into shapes that can be oblong or flat. That shape can help determine the stability or life of the nucleus, which is, in turn, a factor in determining if the atomic species can even exist or be synthetically created. Because of strong electrostatic repulsion, some of these superheavy nuclei may have extremely short lifetimes. "A typical lifetime of a nucleus is in the extremely heavy range of a millisecond," said Nazarewicz.
Bill Cabage | EurekAlert!
First Juno science results supported by University of Leicester's Jupiter 'forecast'
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Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
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Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
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An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
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26.05.2017 | Life Sciences
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26.05.2017 | Physics and Astronomy