Sentence examples for technetium from inspiring English sources

It crystallizes in the hexagonal close-packed structure and is a superconductor below 11.2 K. Except for technetium-99, technetium-97, and technetium-98 (4,200,000-year half-life), technetium isotopes are short-lived.

Those that do not, such as technetium and americium, have been substituted, respectively, by rhenium and neodymium, which have similar traits.

But the main role of the protons is to knock neutrons free from nuclei in the target.These neutrons should, if all goes well, be absorbed by the technetium and other fission products, transmuting them into new elements.

They break uranium atoms, which are heavy, into lighter so-called fission products, such as technetium.

Just as technetium and promethium are islands of instability in parts of the periodic table which are not normally radioactive, so many physicists believe that in the unstable part at the bottom there lies an island of stability.

As a result technetium, element number 43, and promethium, 61, are always radioactive (and are not found naturally in detectable quantities).

Though many radioisotopes are used as tracers, iodine-131, phosphorus-32, and technetium-99m are among the most important.

The isotope technetium-97 (4,210,000-year half-life) was discovered (1937) by the Italian mineralogist Carlo Perrier and the Italian-born American physicist Emilio Segrè in a sample of molybdenum that had been bombarded by deuterons in the Berkeley Californiaa) cyclotron.

Moreover, the observation of technetium-99 is ample evidence that these processes are at work in stars today.

The most important isotope, because it is the only one available on a large scale, is technetium-99 (211,000-year half-life); it is produced in kilogram quantities as a fission product in nuclear reactors.

The metastable isotope technetium-99m (6-hour half-life), used with radiographic scanning devices, is valuable for studying the anatomic structure of organs.