نتایج جستجو برای: radioactive isotope
تعداد نتایج: 52673 فیلتر نتایج به سال:
Using advanced Laser spectroscopy methods, nuclear ground state spins, moments, charge radii, of radioactive nuclei can be determined. The optical techniques, based on hyperfine structure splitting (HFS) or isotope shift measurements, yield model-independent information about the nucleus. Various experimental methods and concepts are proposed to take advantage of the exotic nuclei provided at l...
The high-intensity proton beam of the TRIUMF 500 MeV cyclotron offers unique opportunities to produce rare isotopes by irradiating a variety targets. In particular, ISAC (Isotope Separation and ACceleration) facility provides infrastructure deliver customized ion beams for fundamental research in nuclear physics, astrophysics, material science, medicine. A continuous effort is made develop new ...
• Stellar Evolution, accented with Modules for Experiments for Stellar Astrophysics (MESA) • Supernovae, with emphasis on their progenitor evolution, explosion, and nucleosynthesis • Cosmic chemical evolution, the evolution of every isotope at every point in spacetime • Astrobiology, the synthesis and delivery of bioessential elements to habitable systems • Gamma-ray astronomy, particularly fro...
• Stellar Evolution, accented by Modules for Experiments for Stellar Astrophysics (MESA) • Supernovae, with emphasis on their progenitor evolution, explosion, and nucleosynthesis • Cosmic chemical evolution, the evolution of every isotope at every point in spacetime • Astrobiology, the synthesis and delivery of bioessential elements to habitable systems • Gamma-ray astronomy, particularly from ...
We have performed precision atomic spectroscopy of trapped radioactive Be isotopes aiming at studies of the charge and magnetization radii of these nuclei especially for a single-neutron halo nucleus Be. Some experimental results and the status of the analysis are discussed. PACS. 21.10.Gv Nucleon distributions and halo features – 21.10.Ft Charge distribution – 31.30.Gs Hyperfine interactions a...
The on-line isotope mass separator ISOLDE is the radioactive beam facility of CERN. Its objective is the production and research of nuclei far from stability. Exotic nuclei of most chemical elements are available for the study of nuclear structure, nuclear astrophysics, fundamental symmetries and atomic physics, and for applications in condensed-matter and life sciences. A description of the fa...
INTRODUCTION Anthropogenic plutonium has been introduced into the environment over the past 50 years as the result of the detonation of nuclear weapons and operational releases from the nuclear industry. In the Arctic environment, the main source of plutonium is from atmospheric weapons testing, which have resulted in a relatively uniform, underlying global distribution of plutonium. Other rele...
Cu and Zn have naturally occurring non radioactive isotopes, and their isotopic systematics in a biological context are poorly understood. In this study we used double focussing mass spectroscopy to determine the ratios for these isotopes for the first time in mouse brain. The Cu and Zn isotope ratios for four strains of wild-type mice showed no significant difference (delta 65Cu -0.12 to -0.78...
The behavior in vivo of transferrin in loading and unloading iron from its two sites was examined in rats. Radioiron entering the plasma from the gastrointestinal tract in iron-deficient, normal and iron-loaded rats did not differ in its subsequent tissue distribution between erythroid marrow and liver of normal recipients from a second isotope added to the same plasma in vitro. Loading studies...
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