نتایج جستجو برای: nuclear chemistry
تعداد نتایج: 343716 فیلتر نتایج به سال:
The large body of experimental data on nuclear fission is analyzed with a semiempirical ordering scheme based on the macro-microscopic approach and the separability of compound-nucleus and fragment properties on the fission path. We apply the statistical model to the non-equilibrium descent from saddle to scission, taking the influence of dynamics into account by an early freeze out. The presen...
Hadron structure and nuclear structure are discussed from the common ground of effective chiral Lagrangians modeling QCD at low energy. The topics treated are the chiral bag model in large Nc QCD, its connection to heavy-baryon chiral perturbation theory (HBχPT), the role of nonabelian Berry gauge connections for baryon excitations and the application of HBχPT to the thermal n+p → d+γ process a...
The description of nuclear matter bulk properties in the framework of quarkbased hadron models in curved unit cells is extended to finite temperature. We discuss the analogy and interplay of density and temperature effects in this formulation and study, as an application, the temperature and density dependence of chiral vacuum properties in the Nambu-Jona-Lasinio (NJL) model. Typeset using REVT...
2 Relativistic theory of NMR shieldings and spin-spin coupling constants 3 2.1 Relativity in quantum chemistry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.2 Nuclear shieldings and spin-spin couplings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3 Computational methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
The S-peptide and S-protein components of bovine pancreatic ribonuclease form a noncovalent complex with restored ribonucleolytic activity. Although this archetypal protein-fragment complementation system has been the object of historic work in protein chemistry, intrinsic limitations compromise its utility. Modern methods are shown to overcome those limitations and enable new applications.
Experimental investigations of transactinoide elements provide benchmark results for chemical theory and probe the predictive power of trends in the periodic table. So far, in gas-phase chemical reactions, simple inorganic compounds with the transactinoide in its highest oxidation state have been synthesized. Single-atom production rates, short half-lives, and harsh experimental conditions limi...
Mineralogical Association of Canada Short Course 43, Winnipeg MB, May 2013, p. xx-xx INTRODUCTION The direct disposal of spent nuclear fuel in geologic repositories, built several hundred metres underground, has been under consideration internationally for 20 to 30 years. Various geologic formations are being, or have been, studied including tuff rock, salt domes, sedimentary clay deposits an...
© ( y c EJNMMI Radiopharmacy and Chemistry is a new journal within the EJNMMI family and is now ready to launch the first articles on-line. The aim of EJNMMI Radiopharmacy and Chemistry is to publish research in the field of new imaging and radionuclide based therapeutic agents that can be applied in nuclear medicine and molecular imaging. This new journal provides an ideal platform for chemist...
3 FOREWORD The separation of actinide elements from various waste materials is a significant problem facing developed countries. The issue arises primarily because of the potential long-term hazard of many of the actinides, but is also due to the regulatory requirements associated with actinide waste disposal, which are different from those associated with other radioactive wastes. The differen...
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