Methods: The calculations for semimagic and open-shell nuclei are performed in the framework of self-consistent mean-field theory using quantified energy density functionals and density-dependent pairing forces. Special attention has been paid to the magnetic spin-orbit density associated with the local variations of the spin-orbit current. We assess the precision of nuclear charge density calculations by studying the behavior of relativistic and center-of-mass motion corrections to the second and fourth charge radial moments. Additional corrections come from the effect of center-of-mass projection. The latter induce subtle relativistic corrections due to the coupling of nucleon magnetic moments with the nuclear spin-orbit density. Purpose: The nuclear charge density is composed of the proton point distribution folded with the nucleonic charge distributions. The new data impose higher precision requirements on a theoretical description. In particular, such measurements, augmented by atomic and nuclear calculations, will enable extraction of the higher-order radial moments of the charge-density distribution in spherical and deformed nuclei. Grossi said the growing worldwide interest in nuclear energy has led the IAEA to increase its high nuclear energy projection to 873 gigawatts in 2050.īut he cautioned that “to achieve such growth will require a better investment playing field, one that takes into consideration the full benefits of nuclear.Background: Precise measurements of atomic transitions affected by electron-nucleus hyperfine interactions offer sensitivity to explore basic properties of the atomic nucleus and study fundamental symmetries, including the search for new physics beyond the standard model of particle physics. “Of the 30 or so countries that are currently either considering or embarking on the introduction of nuclear power, more than half are in the developing world, and most of these are in Africa,” Grossi said.Īccording to the International Energy Agency, more climate-warming carbon dioxide gas was emitted in 2022 than in any other year in records dating to 1900, a result of air travel rebounding after the COVID-19 pandemic and more cities turning to coal as a low-cost source of power.Ĭarbon dioxide emissions from energy production grew 0.9% to reach 36.8 gigatons in 2022, the agency reported in March. Grossi said interest in nuclear energy is growing because it can not only de-carbonize electricity grids but can also de-carbonize other sectors including to produce sustainable heat for homes and industry as well as drinking water from desalination operations.Īnd in Africa, where electricity capacity is set to grow fivefold by 2050, and in Latin America, where it is forecast to double, countries are also looking at nuclear power, the IAEA chief said. More than 400 nuclear reactors in over 30 countries are supplying global electricity, and Grossi said more than 50 are under construction and many countries are extending their existing nuclear programs.īut “nuclear power’s share of global electricity production decreased by about half” in the past two decades, he said. In the atmosphere, the gas traps heat and contributes to the warming of the climate. Over a quarter of the electricity from nuclear power is low-carbon electricity and global carbon dioxide emissions would be considerably higher without nuclear power, Grossi said.Ĭarbon dioxide is released when fossil fuels such as oil, coal or natural gas are burned for power. nuclear chief said Wednesday.Ĭlimate-warming hydrocarbons still supply more than 80% of the world’s energy, even after the trillions of dollars spent in the green transition of the past 20 years, Rafael Grossi, director general of the International Atomic Energy Agency told the U.N. UNITED NATIONS (AP) - Nuclear energy must be part of the equation to tackle climate change, the U.N.
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