The 28th Council meeting of SESAME (Synchrotron-light for Experimental Science and Applications in the Middle East) was held on 30-31 May 2016, in Brussels at the Berlaymont building of the European Commission. SESAME is a 3rd-generation light source which will use a 2.5 GeV synchrotron ring under construction in Allan, Jordan.
"A la ciencia española le faltan grandes infraestructuras como el acelerador". . La Universidad de Granada inicia una serie de charlas divulgativas sobre el macroproyecto internacional IFMIF-Dones, al que opta la provincia como sede de una candidatura estatal
A team of risk experts who have carried out the biggest-ever analysis of nuclear accidents warn that the next disaster on the scale of Chernobyl or Fukushima may happen much sooner than the public realizes. Researchers at the University of Sussex, in England, and ETH Zurich, in Switzerland, have analysed more than 200 nuclear accidents, …
Taking advantage of the new Extra Low ENergy Antiprotons (ELENA) ring and anti-proton decelerating facility at CERN, the authors propose to measure the Lamb shift of anti-hydrogen. This equates to a measurement of the anti-proton radius for the first time at the 10% level as well as a test of the fundamental CPT symmetry.
Plutonium alpha phase metal samples are mirror finished 6mmx6mm squares 250 micrometers thick, sandwiched between platinum sample holders and transparent lithium-fluorite windows, and mounted in Z tar..
Scientists from Lawrence Livermore National Laboratory (LLNL) have found that, contrary to popular belief, the Earth is not comprised of the same material found in primitive meteorites (also known as chondrites).
For the first time scientists have measured the radius of a calcium nucleus with 32 neutrons – indicating that nuclear physics theories don’t describe atomic nuclei as well as previously thought. The study, conducted by CERN scientists at the ISOLDE facility and published in the latest issue of the journal Nature Physics, aimed to understand whether calcium has more than two magic numbers.
Download a PDF of "Molybdenum-99 for Medical Imaging" by the National Academies of Sciences, Engineering, and Medicine for free. Description: The decay product of the medical isotope molybdenum-99 (Mo-99), technetium-99m (Tc-99m), and associated medical isotopes iodine-131 (I-131) and xenon-133 (Xe-133) are used worldwide for medical diagnostic imaging or therapy. The United States consumes about half of the world’s supply of Mo-99, but there has been no domestic (i.e., U.S.-based) production of this isotope since the late 1980s. The United States imports Mo-99 for domestic use from Australia, Canada, Europe, and South Africa.
Mo-99 and Tc-99m cannot be stockpiled for use because of their short half-lives. Consequently, they must be routinely produced and delivered to medical imaging centers. Almost all Mo-99 for medical use is produced by irradiating highly enriched uranium (HEU) targets in research reactors, several of which are over 50 years old and are approaching the end of their operating lives. Unanticipated and extended shutdowns of some of these old reactors have resulted in severe Mo-99 supply shortages in the United States and other countries. Some of these shortages have disrupted the delivery of medical care. Molybdenum-99 for Medical Imaging examines the production and utilization of Mo-99 and associated medical isotopes, and provides recommendations for medical use.
Download a PDF of "Analysis of Cancer Risks in Populations Near Nuclear Facilities" by the National Research Council for free. Description: Analysis of Cancer Risks in Populations near Nuclear Facilities is a pilot study requested by the United States Nuclear Regulatory Commission (USNRC) to assess the risk of cancer near nuclear facilities in the United States. This effort is being carried out in two phases. The Phase 1 study recommended two study designs appropriate for assessing cancer risks near nuclear facilities. It also recommended a pilot study of seven nuclear facilities to assess the technical feasibility of the recommended study designs. The Phase 2 study is the assessment of cancer risks. The pilot, which is part of the Phase 2 study, is being carried out in two steps: pilot planning and pilot execution. The pilot planning (current step) aims to plan for the pilot study. The pilot execution (next step) aims to carry out the pilot study and evaluate the technical feasibility of implementing the two study designs recommended in the Phase 1 study. If implementation of the study designs is feasible, the methods developed and tested in the pilot study could be used to conduct a nationwide study. Analysis of Cancer Risks in Populations Near Nuclear Facilities: Phase 2 Pilot Planning provides advice to the National Academy of Sciences in performing a number of tasks related to the planning for a pilot epidemiological study, such as identifying the processes for selecting qualified individuals and/or organizations to perform epidemiological and dosimetric tasks and initiating effluent release and meteorological data collection in preparation for estimating doses to the people who live near the pilot nuclear facilities. This report brief report serves as a public record of the committeeâ€™s advice to the National Academy of Sciences on general methodological considerations involved in carrying out the pilot study.
Optical spectroscopy of a primordial isotope has traditionally formed the basis for understanding the atomic structure of an element. Such studies have been conducted for most elements and theoretical modelling can be performed to high precision, taking into account relativistic effects that scale approximately as the square of the atomic number. However, for the transfermium elements (those with atomic numbers greater than 100), the atomic structure is experimentally unknown. These radioactive elements are produced in nuclear fusion reactions at rates of only a few atoms per second at most and must be studied immediately following their production, which has so far precluded their optical spectroscopy. Here we report laser resonance ionization spectroscopy of nobelium (No; atomic number 102) in single-atom-at-a-time quantities, in which we identify the ground-state transition 1S0 nature19345-m17gif1K3323 1P1. By combining this result with data from an observed Rydberg series, we obtain an upper limit for the ionization potential of nobelium. These accurate results from direct laser excitations of outer-shell electrons cannot be achieved using state-of-the-art relativistic many-body calculations that include quantum electrodynamic effects, owing to large uncertainties in the modelled transition energies of the complex systems under consideration. Our work opens the door to high-precision measurements of various atomic and nuclear properties of elements heavier than nobelium, and motivates future theoretical work.
Jonathan Ward Engle Project will develop international collaborations with wide-reaching impact LOS ALAMOS, N.M., May 12, 2016—A Los Alamos National Laboratory researcher in Chemistry Division, Jonath..
The internationally renowned Italian physicist Professor Paolo Giubellino will be the first joint scientific managing director and spokesperson of the directorate of the Facility for Antiproton and Ion Research in Europe GmbH (FAIR GmbH) and GSI Helmholtzzentrum für Schwerionenforschung GmbH in Darmstadt. This was decided by the FAIR Council and the GSI Supervisory Board. The contracts have already been signed, and Giubellino will take up his new position in Darmstadt on January 1, 2017.
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