“If the magnetic field is stronger on one side, it could be limiting convection [bubbling in the helium layer],” Caiazzo said. “On the other side, convection could be winning out and so the hydrogen layer has been lost.” The findings are published in the journal Nature....
The sniffing leak detection is the perfect method for components under pressure. Helium or hydrogen is pumped into a test object, such as a piece of equipment, a pipeline, or a container, increasing the internal pressure. A sniffer probe, a tool designed to detect and locate leaks, can be...
The energy and angular distributions ofp, d, t,3He and4He from the three targets Cu, Ag and Au were measured at five different angles for bremsstrahlung with peak energy 500MeV. The measurements were made using a telescope consisting of four surface-barrier detectors. The experimental data are...
Methan, hydrogen, and helium in hydrothermal fluids at 21°N on the East Pacific Rise Noble gas isotopes have been measured in fluid inclusions in sulphides spanning 25 000 years of hydrothermal activity at 13掳N on the East Pacific Rise. The He/He ratios are typical of mid-ocean ridge ...
CPC-Cryolab is a leading provider of cryogenic solutions. We specialize in producing high-quality cryogenic products, such as vacuum-jacketed hydrogen and helium valves, hoses, manifolds, filters, safety relief valves, bayonets, and other liquid hydrogen
7 Comparison of the original35 and revised36 Akahama diamond pressure scales for two measurements. The two scales deviate above 300 GPa. a, Sample pressure–load curve. The force on the piston of the T-DAC is linearly related to the helium gas pressure inflating the membrane, F [kN] = ...
Red giants are evolved stars that have exhausted the supply of hydrogen in their cores and instead burn hydrogen in a surrounding shell. Once a red giant is sufficiently evolved, the helium in the core also undergoes fusion. Outstanding issues in our understanding of red giants include uncertainti...
The conductivity and reflectivity of mixtures of hydrogen and helium under high pressure are calculated using first-principles molecular dynamics and the Kubo-Greenwood formula. Hydrogen-helium mixtures have been predicted to undergo demixing below a certain critical temperature. The impact of phase segre...
Hydrogen is the most abundant of all elements in the universe, and it is thought that the heavier elements were, and still are, being built from hydrogen and helium. It has been estimated that hydrogen makes up more than 90% of all the atoms or three quarters of the mass of the ...