"A thousand becquerels is not a big number for cesium
. Just for comparison, that's lower than the U.S.
accumulates in fish muscle tissues, typically at about 100 times the concentration levels in the surrounding seawater.
The Tokyo metropolitan government said levels of radioactive cesium
reached 650 becquerels per kilogram, exceeding the government-set limit of 500 becquerels per kg.
Both iodine and cesium
are not found in nature, but the amount detected cannot pose any health risks even if a person is exposed to this level constantly all year, he added.
It basically says that these things [optical atomic clocks] are now capable of being better than cesium
[clocks]," says atomic clock specialist Patrick Gill of the National Physical Laboratory in Teddington, England.
We have described the design and performance of a phase-stabilized cesium
vapor magnetometer with a measurement bandwidth of 1 Hz.
In 1999, Avalon, through an initial reconnaissance mapping and sampling program, confirmed the presence of economically significant tantalum mineralization at several locations, on the property and also discovered high-grade cesium
mineralization in association with the tantalum.
Until recently, there was no viable alternative to the $50,000 to $60,000 cesium
unit in these applications.
The whole atomic clock system of these wristwatches are contained in a computer chip, while it still needs a cavity full of cesium
Not surprisingly, they found no iodine-131, the isotope which along with cesium
had been released in highest quantity from the damaged Dai-ichi nuclear power plant.
Bluefin tuna migrating from Japan to Southern California are bringing a little excess baggage with them -- radioactive cesium
isotopes originating from the Japanese nuclear power plant damaged by last year's tsunami, (http://www.pnas.org/content/early/2012/05/22/1204859109) according to a new study .
The meat of six cows shipped from a Fukushima Prefecture farm at the heart of growing concerns over beef containing traces of radioactive cesium
has been distributed to at least nine prefectures, including Tokyo and Osaka, with some of it already eaten, officials of prefectural governments said Tuesday.
A sensitive instrument installed in the Canadian Arctic to monitor fallout from modern nuclear tests has detected small amounts of radioactive cesium
produced by bomb tests decades ago.
A team of researchers from NIST have met a major milestone in the Defense Advanced Research Projects Agency's Chip Scale Atomic Clock (CSAC) program by successfully microfabricating a cesium
(Cs) vapor cell with a volume of less than 10 m[m.sup.3] using silicon micromachining techniques.