Results 1 - 10 of 25828
Results 1 - 10 of 25828. Search took: 0.049 seconds
|Sort by: date | relevance|
[en] A total of 194 isotopes with 11≤Z≤19 have been identified to date. The discovery of these isotopes which includes the observation of unbound nuclei, is described. For each isotope a brief summary of the first refereed publication, including the production and identification method, is presented.
[en] Properties of strongly interacting, two-component finite Fermi systems are discussed within the recently developed coordinate-space Hartree-Fock-Bogoliubov (HFB) code HFB-AX. Two illustrative examples are presented: (i) weakly bound deformed Mg isotopes, and (ii) spin-polarized atomic condensates in a strongly deformed harmonic trap.
[en] Currently, 31 rubidium, 35 strontium, 35 molybdenum, and 38 rhodium isotopes have been observed and the discovery of these isotopes is described here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.
[en] In current article were reported results of chemical and radiochemical measurements from formation waters separated from oil pumped from approximately 700 m below ground near Baku, Azerbaijan. The results also include data from a formation water storage pond (''radium lake'') where the waters are temporarily stored after oil is separated and then eventually disposed of by pumping into the Caspian Sea. It was obtained that, there is a relatively strong inverse relationship to bicarbonate and sulfate, the bicarbonate dependency appears stronger. The radium-bicarbonate relationship, however, suggests that carbonate precipitation in formation waters is significant and may be an important control on the radium concentration.
[en] A new single-particle basis is proposed for use in weakly-bound nuclei far from the valley of beta stability. The basis, obtained by applying a local-scaling point transformation to the states of a harmonic oscillator potential can have the correct asymptotic properties for weakly-bound systems. It is presented a test of the basis and then applied it in Hartree-Fock-Bogoliubov calculations of the even Mg isotopes, from the proton drip line to the neutron drip line
[ru]Предлагается новый одночастичный базис для использования в слабо связанных ядрах далеко от долины бета-стабильности. Этот базис, полученный при применении локально масштабных точечных преобразований к состояниям гармонического осцилляторного потенциала, может иметь корректные асимптотические свойства слабо-связанных систем. Представлено испытание базиса, а затем применение его в вычислениях Хартри-Фок-Боголюбова четных изотопов Mg из протонной струи к нейтронной струе
[en] Identification of proper geographical origin of traditional Chinese medicine is critical for guaranteeing the quality and efficacy of the medicine, safeguarding the market order, and reducing the medical negligence rate due to fake products. Stable isotope technology, as one of the most efficient methods to determine agricultural products authenticity and traceability, have great advantages and theoretical basis for determining geo-origin of traditional Chinese medicine, and it has been applied to many expensive herbs. In this review, the basic principles of isotopic traceability were firstly introduced. We then elaborate in details the frequently-used isotopic indicators in the geo-origin studies of traditional Chinese medicine. We also provide a summary of current research progresses and point out some directions for future research. The purpose of this paper is to promote the applications of stable isotopes to traditional Chinese medicine traceability studies and the establishment of the isotopic database and the improvement of the medicine traceability. (authors)
[en] The Cana Brava complex is an anorogenic stratiform complex, whose layers dip from 300 to 500 NW. The massif is made up of five units composed of layers containing several associations of cumulus phases and variable amounts of inter-cumulus minerals. Transition between units are characterized by abrupt changes in the composition of these phases. From base to top, the sequence consists of amphibolites (PICB1), overlain by serpentinites (PICB2), metawebsterites (PICB3), and metagabbros (PICB4 and PICB5). This sequence was originally formed by microgabbros, peridotites, websterites, and gabbros. Isotopic data indicate that the parental magma of the Cana Brava complex evolved as follows: mantle derivation at about 2.5 Ga and subsequent retention at subcrustal levels; intrusion within the Palmeiropolis volcano-sedimentary sequence and igneous crystallization at about 2.0 Ga; (c) Metamorphism and ductile-ruptile deformation under compression at about 1.3 Ga; and (d) Further metamorphic reequilibration during the Brasiliano Cycle at about 0.77 Ga. (Author)