The final step in collecting xenon or
krypton gas would be to put the MOF material under a vacuum, which sucks the gas out of the molecular cages for safe storage.
He says the precision of the measurements obtained so far in
krypton gas has encouraged the team to move on to tritium — a goal Formaggio says may be attainable in the next year or two — and pave a path toward measuring the mass of the neutrino.
Top - of - the - line double - insulated windows also use
krypton gas rather than argon or plain old air for insulation.
Keitel and colleagues tested quantum tunneling by blasting argon and
krypton gas with laser pulses.
Not exact matches
Development of a
krypton - doped
gas symmetry capsule platform for x-ray spectroscopy of implosion cores on the NIF
For example, they want to measure the planet's inventory of stable noble
gases, such as xenon and
krypton, which change little in abundance over billions of years and hold clues to planetary origins.
Greg Holland of the University of Manchester, UK, and colleagues have other ideas, after collecting samples of the noble
gas krypton beneath New Mexico.
Solidified
krypton is white and crystalline with a face - centered cubic crystal structure which is a common property of all «rare
gases».
A colorless, odorless, tasteless noble
gas,
krypton occurs in trace amounts in the atmosphere, is isolated by fractionating liquefied air, and is often used with other rare
gases in fluorescent lamps.
At the end of June, two tracer
gases —
krypton and xenon — were injected into the saline aquifer, says Josie McInerney, the community liaison officer for CO2CRC.
To test this, Laricchia's team fired positronium atoms at 1100 to 4400 kilometres per second into various
gases, including hydrogen,
krypton and water vapour.
Previously we have been doing experiments at our beamline using other much heavier, and therefore easily detectable, noble
gases such as xenon and
krypton.
They also tried the experiment using atmospheres of different
gases, including
krypton and helium.
The knowledge gained from such research could inform the design, selection, and improvement of adsorbent materials and membranes for capturing
gases such as radioactive
krypton and xenon generated by nuclear power plants.
Another radioactive
gas,
krypton, was injected to help scientists distinguish between signals produced by ambient radioactivity and a potential dark matter signal.
Weiss had to distill, heat and pass the air samples over adsorbents to remove
gases such as carbon dioxide and
krypton that could foul the extremely sensitive detector.
The prevalences and isotope ratios of the noble, or inert,
gases, such as neon, argon,
krypton and xenon, provide a valuable tracer of ancient processes, because they are chemically nonreactive and so do not change much over time.
In the samples of mantle
gas taken by Holland and his colleagues, the
krypton measurements were heavy, producing «something that looks rather like
gases that are trapped in primitive chondrites today,» Pepin says.
Greg Holland of the University of Manchester, UK, and colleagues have arrived at a different theory after collecting samples of the noble
gas krypton from several hundred metres beneath New Mexico.
Inert
gases such as neon (Ne), helium (He), and
krypton (Kr) and other constituents such as nitrogen oxides, compounds of sulfur, and compounds of ozone are found in lesser amounts.
To find the best MOF for xenon and
krypton separation, computational chemists led by Haranczyk and Smit screened 125,000 possible MOFs for their ability to trap the
gases.
To capture xenon and
krypton, conventional technologies use cryogenic methods in which entire
gas streams are brought to a temperature far below where water freezes — such methods are energy intensive and expensive.
After optimizing the preparation of SBMOF - 1, Thallapally and his team at PNNL tested the material by running a mixture of
gases through it - including a non-radioactive form of xenon and
krypton - and measuring what came out the other end.
One important step is collecting radioactive
gases xenon and
krypton, which arise during reprocessing.
To capture xenon and
krypton, conventional technologies use cryogenic methods in which entire
gas streams are brought to a temperature far below where water freezes - such methods are energy intensive and expensive.
Initial case studies include the accurate calculation of the excited states of pyrrole and its complexes with rare
gas atoms (such as argon,
krypton and xenon) to explain the qualitatively different results obtained during photofragment slice imaging experiments performed at IESL.
A few of those
gases (basically the noble
gases: argon,
krypton, neon, and xenon) had the same relative abundances as those found in Mars» atmosphere in 1976.
These experiments suggest that the clustering with selected rare
gas carrier atoms (such as
krypton and xenon but not argon) can selectively quench N - H bond fission.
Like the other noble
gases,
krypton is often used in tube lighting.
Severinghaus measured values of the noble
gases argon,
krypton, and xenon in air bubbles captured inside ice cores in Antarctica.
GAS FILLS: Argon or
krypton mixes slow the movement of warm and cool air in IG airspaces and improve thermal performance.
The atmosphere is about 800 km (500 miles) deep and is made up of 21 % oxygen, 78 % nitrogen, 0.037 % carbon dioxide, and other
gases including hydrogen, helium, neon, argon,
krypton, xenon, and water vapour.