Results 131 to 140 of about 20,135 (183)
Some of the next articles are maybe not open access.
Isotopic exchange in the cobaltous-cobaltic system in perchloric acid
Journal of Inorganic and Nuclear Chemistry, 1962Systematic investigations are reported on the isotopic exchange in the cobaltous-cobaltic system using cobalt-60. Ammonia and ethylenediamine were found to be satisfactory quenchers of this fast exchange, even though some zero-time exchange was observed.
J. Shankar, B.C. de Souza
openaire +1 more source
Nuclear alignment in isotopes of cobalt
Physica, 1952Synopsis A significant anisotropy of γ radiation from aligned Co 60 nuclei has been detected. From the variation of the anisotropy with temperature a value for the magnetic moment can be determined: this is 3.5 ± 0.5 nuclear magnetons and is consistent with the Schmidt limit of 3.8 based on nuclear shell model assignments. Similar investigation of Co
M.A. Grace, H. Halban
openaire +1 more source
A shell model of the cobalt isotopes
Canadian Journal of Physics, 1978Binding energies, excitation energies, and single nucleon transfer spectroscopic factors of the 55 ≤ A ≤ 60 cobalt isotopes have been calculated in a 1f–2p shell configuration space assuming a 56Ni core. Single-particle energies were determined empirically and two-body matrix elements were computed with the modified surface delta interaction (MSDI ...
T. Taylor, R. G. Summers-Gill
openaire +1 more source
Quasi-particle structure of proton–hole cobalt isotopes
Nuclear Physics A, 2015Abstract Projected Shell Model calculations have been employed for the description of the ground band in odd mass 57–67Co isotopes. In the present work, quadrupole and monopole pairing interactions as well as quadrupole–quadrupole interactions are effectively included in the Hamiltonian for obtaining various nuclear structure properties using the ...
Anuradha Gupta +6 more
openaire +1 more source
Isotope effect and self-diffusion in face-centred cubic cobalt
Physica Status Solidi (a), 1979Self-diffusion in cobalt is investigated from 896 to 1745 K by means of the standard radio-tracer method using lathe sectioning in the paramagnetic and sputter sectioning in the ferromagnetic region. The diffusion coefficients vary between about 10−17 cm2 s−1 and 10−9 cm2 s−1; their temperature dependence can be described by DT = 0.55 exp (−2.99 eV/kT)
W. Bussmann +4 more
openaire +1 more source
Determination of Small Amounts of Cobalt Using Isotope-Dilution with Cobalt-60
Analytical Chemistry, 1961Trace amounts of cobalt are determined in vitamin B/sub 12/ and biological materials by an isotope-dilution technique combined with a spectrophotometric method. Interference due to copper is overcome by reduction with metallic iron. The procedure employs Co/sup 60/ as the tracer. (auth)
J. T. Byrne, G. A. Rost
openaire +1 more source
Beta decay of neutron-rich cobalt and nickel isotopes
Exotic nuclei and atomic masses (ENAM 98), 1998We report on the first β-γ spectroscopy measurements of the neutron-rich 68–70Co and 70–74Ni nuclei, produced in proton-induced fission of 238U and ionized in a laser ion guide coupled to an on-line mass separator. Several γ lines from the decay of these nuclei have been identified, half-lives determined and production cross sections deduced.
S. Franchoo +17 more
openaire +1 more source
LEAD ISOTOPE RATIOS FROM THE COBALT–NORANDA AREA, CANADA
Canadian Journal of Earth Sciences, 1965Lead isotope ratios indicate that very old galenas in Archean volcanics and sediments in the vicinity of Timmins, Ontario; Noranda and Val d'Or, Quebec, have had additions of younger lead of the type found near Cobalt, Ontario. The mixture of leads of two distinct ages has produced isotopic ratios which are linearly related.
E. R. Kanasewich, R. M. Farquhar
openaire +1 more source
A Novel Technique to Determine Cobalt Exchangeability in Soils Using Isotope Dilution
Environmental Science & Technology, 2007The environmental risk posed by Co contamination is largely a function of its oxidation state. Our objective was to assess the potential biological availability of Co and the reactions and fate of soluble Co(II) after addition to soils with varying physical and chemical characteristics.
Wendling, Laura A. +2 more
openaire +3 more sources
Radiochemical separation of cobalt by isotopic exchange
Talanta, 1964Abstract The radiochemical separation of cobalt by an isotopic exchange technique has been evaluated for an aqueous 0.5 M oxalic acid system. The optimised procedure requires 6 min for the entire separation and gives cobalt yields of more than 83%.
openaire +1 more source