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How Much Cesium Would You Like With That Bordeaux, Sir?

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Radioisotope (Pb, Cs, Ra) Measurements at Flett Research Ltd.

We use a pair of Geranium Gamma Detectors to measure the levels of the Cs and Pb isotopes in cores. The presence of Cs preserved in the sediments is associated with nuclear weapon testing, and its initiation is interpreted to correspond to around We use the peak trace of Cs to determine the stratigraphic interval that was deposited in Pb activity within sediment can be used to estimate accretion rates. Pb is a product of the uranium-decay series where Ra within the crust decays to Rn A fraction of the Rn enters the atmosphere where it in turn decays to Pb, and then quickly precipitates out of the atmosphere, is deposited at the surface, and decays with a half-life of Both isotopes when coalescing with raindrops, will fall to the atmosphere and be absorped and adsorped by plant matter in a marsh.
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Fukushima’s nuclear signature found in California wine

Quantifying the effectiveness of erosion control practices in watersheds remains a difficult problem. Determination of recent sediment accumulation rates for lake sediments in agricultural watersheds using radioisotopes, such as lead Pb and cesium Cs , is potentially a valuable means of assessing the effectiveness of soil conservation practices at the watershed scale. The predominance of sediment arriving in runoff from the watershed, variable sedimentation rates, and mechanical mixing of soil in nearby fields all present challenges in the conversion of radioisotope data to sedimentation rates. Four sediment cores from Beasley Lake, Mississippi, were used to demonstrate the application of the Constant Initial Concentration CIC model for calculating sediment age from the distribution of Pb bottom sediments.
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The Kitchen Sisters. French physicist Philippe Hubert uses gamma rays to detect radioactivity in wine. In a laboratory, deep under a mile-high stretch of the Alps on the French-Italian border, Philippe Hubert , a physicist at the University of Bordeaux, is testing the authenticity of a bottle of wine. First, Hubert takes the bottle in the hand and puts it close to a detector. After he closes the shielding, which blocks the radiation, he records the gamma rays.
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