Isotopes half-lives

Isotope Half-life Source Energy, MeV Abundance, % Disintegration, MeV... [Pg.193]

Isotope Half-Life 7-Ray Energies, Mev Approx. 7-Ray Output/Curie, (r/hr/ft)6 Type of Use... [Pg.291]

Isotope Half Life (years) Decay Constant (year Reference... [Pg.389]

Isotope Half-life Mode of decay Decay product Decay product half-life Mode of decay Decay product ... [Pg.5]

PET imaging using 8F-fluoromisonidazole (FMISO) and 18F-fluoroazomycinarabinofuranoside (FAZA) is well established for human application, allowing the measurement of hypoxia status. Their limitations include poor availability of the radiolabeled product and short lifetime of the 18F PET isotope (half life ca. 110 min). [Pg.151]

Isotope Half-life Source of radioactive isotope... [Pg.379]

Isotope Half-life years Mode of formation3) Specific activity Ci/g Principal mode of decay Energy, MeV Maximum15) permissible body burden liC i... [Pg.46]

Isotope Half-life (yr) Principal radiation Main occurrence... [Pg.60]

Symbol Ar atomic number 18 atomic weight 39.948 an inert gas element electronic configuration Is22s22p63s23p ionization potential 15.76eV stable isotopes and natural abundance Ar-40 99.6%, Ar-36 0.337%, Ar-38 0.063% unstable isotopes, half-life and disintegration mode ... [Pg.59]

Chlorine fluoride, 21 235, 236, 238, 240, 242, 244, 246, 247, 249 geometry of, 18 320-322 oxygenation of, 18 349 oxygen-containing, 21 245 Chlorine fluoride oxide radicals, 18 385, 386 Chlorine hydroxide, 5 219 Chlorine isotope, half-life determination, 2 ... [Pg.46]

Decatriene complexes with gold, 12 348 Decay method, of isotope half-life determination, 2 325... [Pg.73]

SPARC (Secreted Protein Acidic and Rich in Cysteine), 46 484-485 Specific activity method, of isotope half-life determination, 2 326-327 Specific interaction theory, application, 43 19-21... [Pg.279]

Isotope Half-life Type of emission Energy (MeV)... [Pg.332]

Isotope Half-life (tj) Particle emitted Isotope Half-life (fs) Particle emitted... [Pg.404]

Isotope Half-life Specific activity of 100% isotopic abudance (Ci/mol) Type oF emission Maximum energy of emission (MeV)... [Pg.436]

Lanthanides are coextracted with actinides and then separated from actinides, which are forecasted to be sent to a repository. The lanthanide elements comprise a unique series of metals in the periodic table. These metals are distinctive in terms of size, valence orbitals, electrophilicity, and magnetic and electronic properties, such that some members of the series are currently the best metals for certain applications. Increased use of the lanthanides in the future is likely, because their unusual combination of physical properties can be exploited to accomplish new types of chemical transformations. These elements coextracted with actinides and then separated from the latter, could in the future be recovered and used (among the lanthanides, only 151Sm is a long-lived isotope (half-life 90 years)).4... [Pg.200]

Isotope Half Life I11 X(15mK) Magnetic Moment... [Pg.354]

Although americium (Am) exists in seawater exclusively in the trivalent oxidation state, its profiles in Fig. 12.4 contrast sharply with those of the trivalent lanthanides. Assessments of Nd isotopic ratios in seawater (e.g. Bertram and Elderfield, 1993) indicate that more than 1000 years are required for attainment of steady-state distributions of lanthanides and chemically similar elements in seawater. On such a basis it is expected that, in spite of substantial chemical similarities to the lanthanides, 241Am, a relatively short-lived isotope (half-life 470 years) with variable and recent anthropogenic inputs, will not exhibit profiles similar to those of the lanthanides. [Pg.334]

Isotope Half-life (year) Mass of 1 Bq (g) Typical UK surface soil concentration range ... [Pg.183]

Table Longest-lived isotopes of actinides Atomic no. Element Isotope Half-life... [Pg.281]

The uranium-graphite nuclear reactor (or nuclear pile ) was important not merely because it proved the feasibility of a self-sustaining fission chain. It could be used, with minor modification, for neutron irradiation of a sample by placing the sample in the interior of the reactor. Also, the system could be used as a source for the easily fissionable Pu239. This isotope (half-life 24,100 years) is a product in the decay chain from U239, which in turn results from the (n,y) reaction on U238 ... [Pg.477]

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