Helium in a sentence

Helium One Global’s pure helium play differs significantly from other helium sources, which are typically byproducts of hydrocarbon gas production, with lower helium concentrations.

Eventually, the clear spectrum of helium gas appeared, proving that alphas were at least ionised helium atoms, and probably helium nuclei.

Helium II state main Liquid helium below its lambda point (called helium II) exhibits very unusual characteristics.

Helium novae A helium nova (or helium flash) is a proposed category of nova explosion that lacks hydrogen lines in the spectrum.

This left the early universe with a very similar ratio of hydrogen/helium as is observed today (3 parts hydrogen to 1 part helium-4 by mass), with nearly all the neutrons in the universe trapped in helium-4.

This produces one helium for every 12 hydrogens, resulting in a universe that is a little over 8% helium by number of atoms, and 25% helium by mass.

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Global Helium Corp., an exploration stage company, acquires, explores for, develops, and produces helium resources in Canada and United States.

In response to the element's scarcity, the United States has been stockpiling helium since the 1960s in a National Helium Reserve called the Bush Dome, a deep underground reservoir outside of Amarillo, Texas.

Instead of a helium nucleus and a neutron, this reaction produces three helium nuclei.

After the star has fused the helium of its core, the carbon product fuses producing a hot core with an outer shell of fusing helium.

Almost all neutrons that fused instead of decaying ended up combined into helium-4, due to the fact that helium-4 has the highest binding energy per nucleon among light elements.

Also, the microscopic properties of helium-3 cause it to have a higher zero-point energy than helium-4.

Argon is preferable to the helium that had been used in the preceding five decades, because helium gas escapes through the intermolecular pores in most containers and must be regularly replaced.

As a result, it has begun to fuse helium into carbon and oxygen producing enough radiation to push away its outer envelopes of hydrogen and helium.

A simpler procedure is to fill the tested object with helium and to manually search for leaks with a hand-held device. citation Helium leaks through cracks should not be confused with gas permeation through a bulk material.

Assuming that sound waves are the most important excitations in helium-4 at low temperatures, he showed that helium-4 flowing past a wall would not spontaneously create excitations if the flow velocity was less than the sound velocity.

A star of less than about half the mass of the Sun will be unable to ignite helium fusion (as noted earlier), and will produce a white dwarf composed chiefly of helium.

Because of its lower solubility, helium does not load tissues as heavily as nitrogen, but at the same time the tissues can not support as high an amount of helium when super-saturated.

Core helium flash stars evolve to the red end of the horizontal branch but do not migrate to higher temperatures before they gain a degenerate carbon-oxygen core and start helium shell burning.