Chernobyl radioactivity persists in fish

Article Abstract:

Concentrations of radioactive caesium in fish was expected to fall rapidly after the accident at the Chernobyl nuclear reactor in 1986. However radiocaesium in brown trout and Arctic charr in a lake contaminated by Chernobyl fallout, has been measured since 1986 and the although the decline was initially rapid for 3-4 years, it was then much slower. Ecological half lives were estimated at 1.0 and 1.5 years for brown trout and Arctic charr, but a two component decay function provides a better model, explaining 90% and 92% of individual variances in caesium concentrations.

Measurement, Fishes, Cesium, Chernobyl, Ukraine, Nuclear Accident, 1986

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Radioactivity of snake venom

Article Abstract:

Samples of snake venom from lands in the former Soviet Union could provide valuable data on the radioactive contamination of the region. The country had a history of radioactive accidents besides the Chernobyl disaster which were poorly studied. Any scientists in the West who have such venom samples are requested to measure the radioactivity and provide information to the scientific community such as dosage, date of acquisition and region. A useful species to measure is the viper Vipera berus.

Pollution, Commonwealth of Independent States, Radioactive pollution, Poisonous snakes, Snake venoms

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Invisible radioactivity

Article Abstract:

An unusual form of nuclear beta-decay has been detected at the GSI heavy-ion laboratory outside Darmstadt, Germany. The capture of the escaping electron within a bound atomic orbital characterizes this variant form, which may prove useful in determining the electron neutrino's mass. An initial measurement at GSI found the mass to be under 410 electronvolts at the 68% confidence level. GSI's new heavy-ion accelerator was crucial in observing the rare beta-decay.

Mass (Physics), Neutrinos, Beta decay

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