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Nuclides commonly used as neutron detector materials are helium-3, lithium-6, boron-10 and uranium-235. [9] The detector material is surrounded by a moderator which reduces the kinetic energy of the neutron (slowing down the neutron).
Cryogenic seals provide a mechanical containment mechanism for materials held at cryogenic temperatures, such as cryogenic fluids. Various techniques, including soldering and welding are available for creating seals; however, specialized materials and processes are necessary to hermetically entrap cryogenic constituents under vacuum-tight conditions.
The Bühlmann decompression model is a neo-Haldanian model which uses Haldane's or Schreiner's formula for inert gas uptake, a linear expression for tolerated inert gas pressure coupled with a simple parameterised expression for alveolar inert gas pressure and expressions for combining Nitrogen and Helium parameters to model the way inert gases enter and leave the human body as the ambient ...
An HID connected to a gas chromatograph (GC) has the great advantage to use helium as both the carrier gas and the ionization gas. An HID is an ion detector which uses a radioactive source, typically β-emitters, to create metastable helium species. [1] The radioactive source ionizes helium atoms by bombarding them with emissions.
AMD began using TSMC 7 nm starting with the Vega 20 GPU in November 2018, [128] with Zen 2-based CPUs and APUs from July 2019, [129] and for both PlayStation 5 [130] and Xbox Series X/S [131] consoles' APUs, released both in November 2020.
A gas pycnometer is a laboratory device used for measuring the density—or, more accurately, the volume—of solids, be they regularly shaped, porous or non-porous, monolithic, powdered, granular or in some way comminuted, employing some method of gas displacement and the volume:pressure relationship known as Boyle's law.
2, the helium hydride ion has a permanent dipole moment, which makes its spectroscopic characterization easier. [8] The calculated dipole moment of HeH + is 2.26 or 2.84 D. [9] The electron density in the ion is higher around the helium nucleus than the hydrogen. 80% of the electron charge is closer to the helium nucleus than to the hydrogen ...
For example, the J/AWG-12 fitted on the Mitsubishi F-1 is said to be closely related to the AN/AWG-12, [3] but the 1990s J/APG-1 is clearly different from the 1940s AN/APG-1 on the P-61B. The Military of the Republic of China (Taiwan) uses a similar system with the "CS/" prefix. For example, CS/MPG-25 is a radar related to the AN/MPQ-46. [4]