Caesium in a sentence

A caesium standard or caesium atomic clock is a primary frequency standard in which electronic transitions between the two hyperfine ground states of caesium-133 atoms are used to control the output frequency.

Caesium-134, and to a lesser extent caesium-135, have also been used in hydrology to measure the caesium output by the nuclear power industry.

In 1882, he produced caesium metal by electrolysing caesium cyanide, avoiding the problems with the chloride. citation Historically, the most important use for caesium has been in research and development, primarily in chemical and electrical fields.

This solution can be evaporated to produce caesium chloride or transformed into caesium alum or caesium carbonate.

Applications Petroleum exploration The largest present-day use of nonradioactive caesium is in caesium formate drilling fluids for the extractive oil industry.

A stoichiometric mixture of caesium and gold will react to form yellow caesium auride (Cs + Au − ) upon heating.

Caesium iodide (CsI), bromide (CsBr) and caesium fluoride (CsF) crystals are employed for scintillators in scintillation counters widely used in mineral exploration and particle physics research to detect gamma and X-ray radiation.

In the two-electrode vacuum tube converter, caesium neutralizes the space charge near the cathode and enhances the current flow. citation Caesium is also important for its photoemissive properties, converting light to electron flow.

It is highly pyrophoric : the autoignition temperature of caesium is −116 °C, and it ignites explosively in air to form caesium hydroxide and various oxides.

A weekend search failed to locate the 25kg tube containing highly radioactive Caesium-137, said Kittiphan Chitpentham of the National Power Supply Public Company, which owns the plant.

Down-dip, deeper drilling also planned at ‘Andrada’ to delineate bounding lithological contacts and to examine untested lithium-caesium-tantalum (LCT) potential plunge target areas.

Further testing revealed some of the resident’s bodies to be carrying abnormally high levels of the equally toxic caesium-137.

Japan allows a maximum of 100 becquerels of caesium radioactivity per kilogramme (Bq/kg).

A few days later one of the men punctured the 1 mm thick window of the capsule, allowing the caesium chloride powder to leak out and when realizing the powder glowed blue in the dark, brought it back home to his family and friends to show it off.

An incident where water-soluble caesium-137 leaked into the source storage pool requiring NRC intervention citation has led to near elimination of this radioisotope outside of military applications.

As with potassium (which is slightly less reactive) and caesium (which is slightly more reactive), this reaction is usually vigorous enough to ignite the hydrogen gas it produces.

Because rubidium substitutes for potassium in the crystallization of magma, the enrichment is far less effective than that of caesium.

Before Essen's invention, the second was defined on the orbit of the Earth around the Sun ; he changed it in 1967 to be based on the hyperfine structure of the caesium-133 atom.

Being a heavy element, caesium provides good stopping power with better detection.

Caesium-137 became the primary source of radiation about 200 days after the accident.