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Monthly Archives: June 2015
Atomic Collisions in Suprafluid Helium-nanodroplets
timescales for metal-cluster formation derived from He-density functional theory Collision times for the coinage metal atoms Cu, Ag and Au in He-droplets are derived from helium density functional theory and molecular dynamics simulations. The strength of the attractive interaction between … Continue reading
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Cavitation Density Of Superfluid Helium-4 Around 1 K
Using an optical interferometric method, the cavitation density of bulk superfluid helium at T=0.96K is measured and found to be ρcav=0.1338±0.0002gcm−3. A well-established equation of state for liquid helium at negative pressures converts this to the cavitation pressure Pcav=−5.1±0.1bars. This … Continue reading
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Doctors Seek Helium Balloons Ban
Doctors will campaign for an end to the “frivolous” use of helium in party balloons as they fear a shortage of the non-renewable gas could jeopardise its vital use in medical equipment. Anaesthetist Dr Tom Dolphin said using helium in … Continue reading
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Doctors Want BAN On Helium in Party Balloons Over Fears Of Medical Shortage Of Gas
Some medical experts fear a ban on the recreational use of the gas could increase use of nitrous oxide – also known as laughing gas. Doctors want to ban the “frivolous” use of helium in party balloons in case there … Continue reading
Posted in Helium application, Helium shortage
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Fabricating Inexpensive, High-temp SQUIDs For Future Electronic Devices
New direct-write approach simplifies fabricating oxide Josephson junctions, eliminating lithographic processing and providing pathway to inexpensive superconducting quantum interference devices (SQUIDs) that operate at more practical temperatures High-transition-temperature superconductivity within copper-oxide materials was discovered in 1986, and quickly set into … Continue reading
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