Did you know that 36 is the atomic number
of krypton or the number of vehicles that run in each race of NASCAR's Camping World Truck Series?
Because light isotopes
of krypton escape into space more quickly than heavy isotopes, the atmosphere can only get «heavier»
The same fractionation process that could turn a solar sample of xenon into a modern - day atmospheric sample of xenon would leave a deficit in light isotopes
of krypton, compared with what is found in Earth's present atmosphere.
An international advisory committee for the definition of the meter has now recommended the adoption of an atomic standard of length — an orange spectral line
of krypton 86.
They found the mantle was rich in heavy isotopes
of krypton, while the atmosphere is rich in its lighter isotopes.
Development
of a krypton - doped gas symmetry capsule platform for x-ray spectroscopy of implosion cores on the NIF
Not exact matches
Determination
of relative
krypton fission product yields from 14 MeV neutron induced fission
of U-238 at the National Ignition Facility
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».
9 But when argon was discovered in 1894, it didn't fit into any
of Mendeleyev's columns, so he denied its existence — as he did for helium, neon,
krypton, xenon, and radon.
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.
A team
of scientists has successfully identified the age
of 120,000 - year - old Antarctic ice using radiometric
krypton dating — a new technique that may allow them to locate and date ice that is more than a million years old.
By crashing
krypton particles into a chunk
of lead, they had created element 118 and the element into which it rapidly decayed, element 116.
They also tried the experiment using atmospheres
of different gases, including
krypton and helium.
Top -
of - the - line double - insulated windows also use
krypton gas rather than argon or plain old air for insulation.
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.
If the ionization states
of silicon can not only be sampled on such a short time scale, but can also be set — as the first experiments with
krypton suggest — scientists might one day be able to use this to develop novel and even faster computer technologies.
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.
The attosecond pulse excited the
krypton atoms, kicking electrons free; then the red - light pulse hit the electrons and took a reading
of their energy.
The
krypton line is the sharpest
of those currently available for length measurement.»
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.
«And the diagnostic clue is that all
of the isotope ratios for neon, argon,
krypton, xenon, nitrogen, what have you, look as if they have suffered an escape process in which the lightest isotope escaped preferentially relative to the heavier ones» — a process called fractionation.
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.
Severinghaus discovered that xenon and
krypton are well preserved in ice cores, which provides the temperature information that can then be used by scientists studying many other aspects
of the earth's oceans and atmosphere over hundreds
of thousands
of years.
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.
Other tests also showed that in the absence
of xenon, SBMOF - 1 captures
krypton.
Thallapally, working with Maciej Haranczyk and Berend Smit
of Lawrence Berkeley National Laboratory and others, has been studying materials called metal - organic frameworks, also known as MOFs, that could potentially trap xenon and
krypton without having to use cryogenics.
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.
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.
Things like, probably stuff you've never heard
of, argon, rubidium, copper, barium, helium, indium, molybdenum, nickel, arsenic, uranium, manganese, vanadium, aluminum, cobalt, silver, zinc,
krypton, chromium, germanium, xenon.
The whole shebang is slathered in a «
krypton orange» paint job, which looks bright enough to blind even the strongest
of superheroes.
They discovered that xenon and
krypton are well preserved in ice cores and can, therefore, provide temperature information that scientists can use to study many other aspects
of the earth's oceans.
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.