New and revised half-life measurements results

Precise measurement of the β decay and electron capture ofNa22,Au198Ruprecht1, Vockenhuber2, Buchmann3 et al. 2008Phys. Rev. C18151View full textAdd to dashboardCite

“…As no temperature dependence could be observed, both results can be concatenated to 2.6937 ± 0.0003 d. This is 0.06%(5σ ) below the recommended NIST value of 2.6952 ± 0.0002 d [27,37] but in excellent agreement with the Table II. 065502-5 high-precision measurement [33]. The recommended value [27,37] seems to be based on a reanalysis of [35] rather than a weighted mean of previous measurements where it remains unclear what exactly was changed in the analysis.…”

“…The recommended value [27,37] seems to be based on a reanalysis of [35] rather than a weighted mean of previous measurements where it remains unclear what exactly was changed in the analysis. The Goodwin measurement [28] is in good agreement with our result with a similar error, and the authors performed extensive dead-time measurements with different sources.…”

Dissolution mechanisms of goethite in the presence of siderophores and organic acids

“…Total dissolved iron concentrations in the filtrate were measured by ICP-MS and the activity of the dissolved 59 Fe was measured with a scintillation counter (Liquid Scintillation Analyzer 2200CA; Packard). A decrease of activities due to natural decay of 59 Fe (t 1/2 = 44.51 day (Unterweger et al, 2001)) was taken into account by reporting the ratios of the activity of the filtered suspension versus the activity of the (filtered) control sample.Twenty nine hour after the addition of 59 Fe-labeled iron (t = 1519 h), 1.0 · 10 À4 M DFO-B were added to induce non-steady-state conditions. Sampling of the control solution and of the suspension was continued after the DFO-B addition for approximately 20 h. Fig.…”

Interaction of the cesium cation with mono-, di-, and tricarboxylic acids in the gas phase. A Cs+ affinity scale for cesium carboxylates ion pairs

“…A s products of nuclear fission, the radioisotopes of cesium 134 Cs and 137 Cs (half-lives 2.1 and 30.1 y, respectively [1]), are typical anthropogenic pollutants. Their main sources were the fallouts of the Chernobyl accident in April 1986, and the atmospheric nuclear weapons tests from 1945 to 1980.…”