noun
COLLOCATIONS FROM CORPUS
■ ADJECTIVE
radioactive
▪
The new ingredient in the assessment of how many deaths the Windscale cloud caused is the radioactive isotope , polonium 210.
▪
Electricity produced by radioactive isotopes , strontium 90, polonium 210, by thermoelectric energy conversion.
▪
The simplest radioactive methods are based on decay of a radioactive isotope into a stable one.
▪
Every radioactive isotope provides an independent clock for measuring geological time.
▪
She could hear the adjacent streetlight sizzling like a radioactive isotope .
▪
Asteroids contain a variety of rare radioactive isotopes of potassium, uranium, thorium, rubidium, and so on.
▪
Increasing the helium-3 supply would mean scaling up the production of the dangerous radioactive isotope tritium.
stable
▪
Each case has to be considered on its merits where an ambiguous answer emerges from the stable isotope data.
▪
As well as decaying naturally to a stable lead isotope , U occasionally also divides in half.
▪
A stable isotope of potassium, 9K, is converted to 39Ar by neutron bombardment of the sample to be dated.
■ NOUN
analysis
▪
Aiding his efforts was an improved method for dating rock known as uranium-lead isotope analysis .
data
▪
Each case has to be considered on its merits where an ambiguous answer emerges from the stable isotope data .
lead
▪
As well as decaying naturally to a stable lead isotope , U occasionally also divides in half.
▪
Nevertheless the association or dissociation of the lead isotope signatures for ancient glasses contributes to the overall technological picture for them.
oxygen
▪
Woodhead etal. combine such analyses with oxygen isotope analyses, and it is variations in the latter that are particularly significant.
▪
The oxygen isotope chemistry of the corals reflects the composition and origin of the water in which they lived.
▪
The deep-sea core oxygen isotope record is a framework for a relative chronology for the Pleistocene.
ratio
▪
Measurements of the resulting isotope ratios closely approximated those found in carbonaceous chondrite meteorites.
signature
▪
Nevertheless the association or dissociation of the lead isotope signatures for ancient glasses contributes to the overall technological picture for them.
EXAMPLES FROM CORPUS
▪
Asteroids contain a variety of rare radioactive isotopes of potassium, uranium, thorium, rubidium, and so on.
▪
But by looking at the levels of various isotopes, geochemists can group the rocks that have similar deep-earth origins.
▪
Electricity produced by radioactive isotopes, strontium 90, polonium 210, by thermoelectric energy conversion.
▪
The isotopes give off long-lasting alpha radiation and the waste will remain dangerous for 3000 years or more.
▪
There is also a section on isotope dilution analysis.
▪
Thiemens said that it might even be possible to apply the effect to enrichment of certain isotopes.
▪
Uranium has two radioactive isotopes, each of which decays to an isotope of lead and helium.
▪
Woodhead etal. combine such analyses with oxygen isotope analyses, and it is variations in the latter that are particularly significant.