caesium BrE
cesium AmE

Until now, however, we have only found cobalt and caesium.

For that reason, caesium atoms are used as the definition of the second.

Caesium in humans normally has a biological half life of between one and four months.

The material was said to be plutonium and caesium from Ukraine.

The biological half-life of caesium is rather short at about 70 days.

He named the element "caesium", after the Latin word for deep blue.

The same mechanism accounts for the yellow color of gold and caesium.

Caesium in the body has a biological half-life of about one to four months.

Caesium, however, is not produced from the above reaction.

Since then, caesium has been widely used in atomic clocks.

Any oil painting made in the nuclear era will show traces of caesium- 137 and strontium-90.

On 19 August radioactive caesium was found in a sample of rice.

Since there is little caesium on the Earth, it is rather expensive.

They named this substance caesium, after the color blue.

It is important as a significant ore of caesium and sometimes rubidium.

The study stresses that the levels of caesium observed do not pose any risk to health.

Caesium chloride has a low toxicity to human and animals.

The biological half-life of caesium in humans is between one and four months.

Mercury is the only metal with a known melting point ( 38.83 C) lower than caesium.

Because of this, caesium is stored in mineral oil.

Caesium formate is used in oil drilling because of its high density.

It is used in a test for caesium.

The content of radioactive caesium in the water sampled was ten times the normal value.

The caesium isotopes in the fallout have had an effect on farming.

Caesium is also used in atomic clocks, which are accurate to seconds over many thousands of years.

There isn't enough information to know how cesium might work.

More evidence is needed to rate the effectiveness of cesium for these uses.

Cesium levels had not decreased 1 year after the accident.

But when he looked in the right front pocket of the jeans, there was no cesium.

An information center is to serve as a memorial to the cesium victims.

Cesium 137 has a half life of 30 years.

Well, so long as they have a cesium 133 atom lying around.

Meaning that he understood why Kent had turned over the cesium.

"Cesium is a complicated way to kill someone or drive them crazy."

Cesium-137 is the most common radioactive form of the metal cesium.

She would return two more times, at one point requiring treatment for cesium poisoning herself.

It went into the Dumpster with the cesium, the gun and everything else they used.

They wanted the cesium, and now they've got it.

That way there would be no cesium trace in their own car."

Would a man who had spread toxic cesium linger at all?

The priority is finding the cesium, and we're now almost 11 hours behind."

Cesium 133 resonates between different energy states 9,192,631,770 times each second with almost no variation.

Time slips away at nine billion cesium ticks per second.

Their clock was based on a transition in the cesium atom.

Tests showed the machines reduced cesium levels by 20 to 30 percent.

Retrieve for us all cesium sources available to you.

"We're running more than 13 hours behind the cesium.

"I'm saying you've got the cesium back, so now we're looking at this as a homicide again.

There isn't enough information to know if lower doses of cesium are safe.

Can't breathe deep in case Carbon 14, cesium 134 and 137.